diff --git a/org.eclipse.jgit.ssh.apache/src/org/eclipse/jgit/internal/transport/sshd/OpenSshServerKeyVerifier.java b/org.eclipse.jgit.ssh.apache/src/org/eclipse/jgit/internal/transport/sshd/OpenSshServerKeyVerifier.java
index 540b586..cfd3d19 100644
--- a/org.eclipse.jgit.ssh.apache/src/org/eclipse/jgit/internal/transport/sshd/OpenSshServerKeyVerifier.java
+++ b/org.eclipse.jgit.ssh.apache/src/org/eclipse/jgit/internal/transport/sshd/OpenSshServerKeyVerifier.java
@@ -134,7 +134,7 @@
  * <p>
  * Note that adding a key to the known hosts file may create the file. You can
  * specify in the constructor whether the user shall be asked about that, too.
- * If the the user declines updating the file, but the key was otherwise
+ * If the user declines updating the file, but the key was otherwise
  * accepted (user confirmed for "<b>ask</b>", or "no" or "accept-new" are
  * active), the key is accepted for this session only.
  * </p>
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/attributes/AttributesNodeDirCacheIteratorTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/attributes/AttributesNodeDirCacheIteratorTest.java
index 7421e90..837de74 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/attributes/AttributesNodeDirCacheIteratorTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/attributes/AttributesNodeDirCacheIteratorTest.java
@@ -64,7 +64,7 @@
 import org.junit.Test;
 
 /**
- * Tests attributes node behavior on the the index.
+ * Tests attributes node behavior on the index.
  */
 public class AttributesNodeDirCacheIteratorTest extends RepositoryTestCase {
 
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/GcConcurrentTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/GcConcurrentTest.java
index 643bb49..9ea62b3 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/GcConcurrentTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/GcConcurrentTest.java
@@ -169,7 +169,7 @@ public void repackAndUploadPack() throws Exception {
 		gc2.gc();
 
 		// Simulate parts of an UploadPack. This is the situation on
-		// server side (e.g. gerrit) when when clients are
+		// server side (e.g. gerrit) when clients are
 		// cloning/fetching while the server side repo's
 		// are gc'ed by an external process (e.g. scheduled
 		// native git gc)
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/MergerTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/MergerTest.java
index 8ca5d45..335a8ca 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/MergerTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/MergerTest.java
@@ -1069,7 +1069,7 @@ public void checkLockedFilesToBeDeleted(MergeStrategy strategy)
 		git.add().addFilepattern("c.txt").call();
 		git.commit().setMessage("added c.txt").call();
 
-		// Get a handle to the the file so on windows it can't be deleted.
+		// Get a handle to the file so on windows it can't be deleted.
 		try (FileInputStream fis = new FileInputStream(
 				new File(db.getWorkTree(), "b.txt"))) {
 			MergeResult mergeRes = git.merge().setStrategy(strategy)
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/api/RemoteSetUrlCommand.java b/org.eclipse.jgit/src/org/eclipse/jgit/api/RemoteSetUrlCommand.java
index d7b7a31..e60d757 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/RemoteSetUrlCommand.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/RemoteSetUrlCommand.java
@@ -54,7 +54,7 @@
 import org.eclipse.jgit.transport.URIish;
 
 /**
- * Used to to change the URL of a remote.
+ * Used to change the URL of a remote.
  *
  * This class has setters for all supported options and arguments of this
  * command and a {@link #call()} method to finally execute the command.
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/api/errors/JGitInternalException.java b/org.eclipse.jgit/src/org/eclipse/jgit/api/errors/JGitInternalException.java
index 57d8a13..7959013a 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/errors/JGitInternalException.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/errors/JGitInternalException.java
@@ -44,7 +44,7 @@
  * <p>
  * During command execution a lot of exceptions may be thrown. Some of them
  * represent error situations which can be handled specifically by the caller of
- * the command. But a lot of exceptions are so low-level that is is unlikely
+ * the command. But a lot of exceptions are so low-level that is unlikely
  * that the caller of the command can handle them effectively. The huge number
  * of these low-level exceptions which are thrown by the commands lead to a
  * complicated and wide interface of the commands. Callers of the API have to
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/diff/SequenceComparator.java b/org.eclipse.jgit/src/org/eclipse/jgit/diff/SequenceComparator.java
index ccd0055..3bc95a2 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/diff/SequenceComparator.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/diff/SequenceComparator.java
@@ -84,7 +84,7 @@ public abstract class SequenceComparator<S extends Sequence> {
 	 * method must produce the same integer result for both items.
 	 *
 	 * It is not required for two items to have different hash values if they
-	 * are are unequal according to the {@code equals()} method.
+	 * are unequal according to the {@code equals()} method.
 	 *
 	 * @param seq
 	 *            the sequence.
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/diff/SimilarityIndex.java b/org.eclipse.jgit/src/org/eclipse/jgit/diff/SimilarityIndex.java
index 5897ffb..539f237 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/diff/SimilarityIndex.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/diff/SimilarityIndex.java
@@ -236,7 +236,7 @@ void sort() {
 	 * A region of a file is defined as a line in a text file or a fixed-size
 	 * block in a binary file. To prepare an index, each region in the file is
 	 * hashed; the values and counts of hashes are retained in a sorted table.
-	 * Define the similarity fraction F as the the count of matching regions
+	 * Define the similarity fraction F as the count of matching regions
 	 * between the two files divided between the maximum count of regions in
 	 * either file. The similarity score is F multiplied by the maxScore
 	 * constant, yielding a range [0, maxScore]. It is defined as maxScore for
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/gitrepo/RepoCommand.java b/org.eclipse.jgit/src/org/eclipse/jgit/gitrepo/RepoCommand.java
index e9d86df..cb62925 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/gitrepo/RepoCommand.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/gitrepo/RepoCommand.java
@@ -147,7 +147,7 @@ public interface RemoteReader {
 		 *            The URI of the remote repository
 		 * @param ref
 		 *            Name of the ref to lookup. May be a short-hand form, e.g.
-		 *            "master" which is is automatically expanded to
+		 *            "master" which is automatically expanded to
 		 *            "refs/heads/master" if "refs/heads/master" already exists.
 		 * @return the sha1 of the remote repository, or null if the ref does
 		 *         not exist.
@@ -187,7 +187,7 @@ public interface RemoteReader {
 		 *            The URI of the remote repository
 		 * @param ref
 		 *            Name of the ref to lookup. May be a short-hand form, e.g.
-		 *            "master" which is is automatically expanded to
+		 *            "master" which is automatically expanded to
 		 *            "refs/heads/master" if "refs/heads/master" already exists.
 		 * @param path
 		 *            The relative path (inside the repo) to the file to read
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/WindowCache.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/WindowCache.java
index 8cf1d4e..e8fac51 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/WindowCache.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/WindowCache.java
@@ -146,7 +146,7 @@ private static final int bits(int newSize) {
 	 * Modify the configuration of the window cache.
 	 * <p>
 	 * The new configuration is applied immediately. If the new limits are
-	 * smaller than what what is currently cached, older entries will be purged
+	 * smaller than what is currently cached, older entries will be purged
 	 * as soon as possible to allow the cache to meet the new limit.
 	 *
 	 * @deprecated use {@code cfg.install()} to avoid internal reference.
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/DeltaEncoder.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/DeltaEncoder.java
index 343faf4..cfc1ccd 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/DeltaEncoder.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/pack/DeltaEncoder.java
@@ -73,7 +73,7 @@ public class DeltaEncoder {
 	/** Maximum number of bytes used by a copy instruction. */
 	private static final int MAX_COPY_CMD_SIZE = 8;
 
-	/** Maximum length that an an insert command can encode at once. */
+	/** Maximum length that an insert command can encode at once. */
 	private static final int MAX_INSERT_DATA_SIZE = 127;
 
 	private final OutputStream out;
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/submodule/SubmoduleValidator.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/submodule/SubmoduleValidator.java
index 7b872b1..cd6af6a 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/submodule/SubmoduleValidator.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/submodule/SubmoduleValidator.java
@@ -61,7 +61,7 @@
  * Validations for the git submodule fields (name, path, uri).
  *
  * Invalid values in these fields can cause security problems as reported in
- * CVE-2018-11235 and and CVE-2018-17456
+ * CVE-2018-11235 and CVE-2018-17456
  */
 public class SubmoduleValidator {
 
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/lib/Repository.java b/org.eclipse.jgit/src/org/eclipse/jgit/lib/Repository.java
index 77d268a..b72b762 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/lib/Repository.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/lib/Repository.java
@@ -297,7 +297,7 @@ public ObjectReader newObjectReader() {
 	/**
 	 * Get the used file system abstraction.
 	 *
-	 * @return the used file system abstraction, or or {@code null} if
+	 * @return the used file system abstraction, or {@code null} if
 	 *         repository isn't local.
 	 */
 	/*
@@ -1079,7 +1079,7 @@ public final Ref exactRef(String name) throws IOException {
 	 *
 	 * @param name
 	 *            the name of the ref to lookup. May be a short-hand form, e.g.
-	 *            "master" which is is automatically expanded to
+	 *            "master" which is automatically expanded to
 	 *            "refs/heads/master" if "refs/heads/master" already exists.
 	 * @return the Ref with the given name, or {@code null} if it does not exist
 	 * @throws java.io.IOException
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/merge/MergeResult.java b/org.eclipse.jgit/src/org/eclipse/jgit/merge/MergeResult.java
index 062d86f..a533bf5 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/merge/MergeResult.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/merge/MergeResult.java
@@ -119,7 +119,7 @@ public void add(int srcIdx, int begin, int end, ConflictState conflictState) {
 
 	/**
 	 * Returns the common predecessor sequence and the merged sequence in one
-	 * list. The common predecessor is is the first element in the list
+	 * list. The common predecessor is the first element in the list
 	 *
 	 * @return the common predecessor at position 0 followed by the merged
 	 *         sequences.
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/nls/NLS.java b/org.eclipse.jgit/src/org/eclipse/jgit/nls/NLS.java
index 89a87af..375cd32 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/nls/NLS.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/nls/NLS.java
@@ -79,7 +79,7 @@ public class NLS {
 	/**
 	 * Sets the locale for the calling thread.
 	 * <p>
-	 * The {@link #getBundleFor(Class)} method will honor this setting if if it
+	 * The {@link #getBundleFor(Class)} method will honor this setting if it
 	 * is supported by the provided resource bundle property files. Otherwise,
 	 * it will use a fall back locale as described in the
 	 * {@link TranslationBundle}
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/ObjectWalk.java b/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/ObjectWalk.java
index e5903c9..fd578da 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/ObjectWalk.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/ObjectWalk.java
@@ -330,11 +330,11 @@ public RevCommit next() throws MissingObjectException,
 	 *
 	 * @return next most recent object; null if traversal is over.
 	 * @throws org.eclipse.jgit.errors.MissingObjectException
-	 *             one or or more of the next objects are not available from the
+	 *             one or more of the next objects are not available from the
 	 *             object database, but were thought to be candidates for
 	 *             traversal. This usually indicates a broken link.
 	 * @throws org.eclipse.jgit.errors.IncorrectObjectTypeException
-	 *             one or or more of the objects in a tree do not match the type
+	 *             one or more of the objects in a tree do not match the type
 	 *             indicated.
 	 * @throws java.io.IOException
 	 *             a pack file or loose object could not be read.
@@ -534,11 +534,11 @@ private static int parseMode(byte[] buf, int startPtr, int recEndPtr, TreeVisit
 	 * provides some detail about the connectivity failure.
 	 *
 	 * @throws org.eclipse.jgit.errors.MissingObjectException
-	 *             one or or more of the next objects are not available from the
+	 *             one or more of the next objects are not available from the
 	 *             object database, but were thought to be candidates for
 	 *             traversal. This usually indicates a broken link.
 	 * @throws org.eclipse.jgit.errors.IncorrectObjectTypeException
-	 *             one or or more of the objects in a tree do not match the type
+	 *             one or more of the objects in a tree do not match the type
 	 *             indicated.
 	 * @throws java.io.IOException
 	 *             a pack file or loose object could not be read.
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/RevWalk.java b/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/RevWalk.java
index 400ea33..0a43e8f 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/RevWalk.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/RevWalk.java
@@ -394,11 +394,11 @@ public void markUninteresting(RevCommit c)
 	 *         <code>base</code> (and thus <code>base</code> is fully merged
 	 *         into <code>tip</code>); false otherwise.
 	 * @throws org.eclipse.jgit.errors.MissingObjectException
-	 *             one or or more of the next commit's parents are not available
+	 *             one or more of the next commit's parents are not available
 	 *             from the object database, but were thought to be candidates
 	 *             for traversal. This usually indicates a broken link.
 	 * @throws org.eclipse.jgit.errors.IncorrectObjectTypeException
-	 *             one or or more of the next commit's parents are not actually
+	 *             one or more of the next commit's parents are not actually
 	 *             commit objects.
 	 * @throws java.io.IOException
 	 *             a pack file or loose object could not be read.
@@ -431,11 +431,11 @@ public boolean isMergedInto(RevCommit base, RevCommit tip)
 	 *
 	 * @return next most recent commit; null if traversal is over.
 	 * @throws org.eclipse.jgit.errors.MissingObjectException
-	 *             one or or more of the next commit's parents are not available
+	 *             one or more of the next commit's parents are not available
 	 *             from the object database, but were thought to be candidates
 	 *             for traversal. This usually indicates a broken link.
 	 * @throws org.eclipse.jgit.errors.IncorrectObjectTypeException
-	 *             one or or more of the next commit's parents are not actually
+	 *             one or more of the next commit's parents are not actually
 	 *             commit objects.
 	 * @throws java.io.IOException
 	 *             a pack file or loose object could not be read.
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/WindowCacheConfig.java b/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/WindowCacheConfig.java
index c2e6a42..ff49976 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/WindowCacheConfig.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/WindowCacheConfig.java
@@ -251,7 +251,7 @@ public WindowCacheConfig fromConfig(Config rc) {
 	 * Install this configuration as the live settings.
 	 * <p>
 	 * The new configuration is applied immediately. If the new limits are
-	 * smaller than what what is currently cached, older entries will be purged
+	 * smaller than what is currently cached, older entries will be purged
 	 * as soon as possible to allow the cache to meet the new limit.
 	 *
 	 * @since 3.0
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/storage/pack/PackConfig.java b/org.eclipse.jgit/src/org/eclipse/jgit/storage/pack/PackConfig.java
index 256e41d..ed3fe2a 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/storage/pack/PackConfig.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/storage/pack/PackConfig.java
@@ -1006,7 +1006,7 @@ public void setBitmapExcessiveBranchCount(int count) {
 	}
 
 	/**
-	 * Get the the age in days that marks a branch as "inactive".
+	 * Get the age in days that marks a branch as "inactive".
 	 *
 	 * Default setting: {@value #DEFAULT_BITMAP_INACTIVE_BRANCH_AGE_IN_DAYS}
 	 *
@@ -1018,7 +1018,7 @@ public int getBitmapInactiveBranchAgeInDays() {
 	}
 
 	/**
-	 * Set the the age in days that marks a branch as "inactive".
+	 * Set the age in days that marks a branch as "inactive".
 	 *
 	 * Default setting: {@value #DEFAULT_BITMAP_INACTIVE_BRANCH_AGE_IN_DAYS}
 	 *
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/InternalHttpServerGlue.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/InternalHttpServerGlue.java
index fe7aaf7..075cc9c 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/InternalHttpServerGlue.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/InternalHttpServerGlue.java
@@ -44,7 +44,7 @@
 package org.eclipse.jgit.transport;
 
 /**
- * Internal API to to assist {@code org.eclipse.jgit.http.server}.
+ * Internal API to assist {@code org.eclipse.jgit.http.server}.
  * <p>
  * <b>Do not call.</b>
  *
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/NonceGenerator.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/NonceGenerator.java
index fc22034..c573d12 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/NonceGenerator.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/NonceGenerator.java
@@ -81,7 +81,7 @@ String createNonce(Repository db, long timestamp)
 	 *            such that the pusher cannot forge nonces by pushing to another
 	 *            repository at the same time as well and reusing the nonce.
 	 * @param allowSlop
-	 *            If the receiving backend is is able to generate slop. This is
+	 *            If the receiving backend is able to generate slop. This is
 	 *            the case for serving via http protocol using more than one
 	 *            http frontend. The client would talk to different http
 	 *            frontends, which may have a slight difference of time due to
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/PackParser.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/PackParser.java
index 49acb4d..2b2795f 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/PackParser.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/PackParser.java
@@ -1237,7 +1237,7 @@ void use(int cnt) {
 		bAvail -= cnt;
 	}
 
-	// Ensure at least need bytes are available in in {@link #buf}.
+	// Ensure at least need bytes are available in {@link #buf}.
 	int fill(Source src, int need) throws IOException {
 		while (bAvail < need) {
 			int next = bOffset + bAvail;
@@ -1568,7 +1568,7 @@ protected abstract void onBeginWholeObject(long streamPosition, int type,
 			long inflatedSize) throws IOException;
 
 	/**
-	 * Event notifying the the current object.
+	 * Event notifying the current object.
 	 *
 	 *@param info
 	 *            object information.
@@ -1616,7 +1616,7 @@ protected abstract void onBeginRefDelta(long deltaStreamPosition,
 			AnyObjectId baseId, long inflatedSize) throws IOException;
 
 	/**
-	 * Event notifying the the current object.
+	 * Event notifying the current object.
 	 *
 	 *@return object information that must be populated with at least the
 	 *         offset.
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/WalkRemoteObjectDatabase.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/WalkRemoteObjectDatabase.java
index 6d4df4f..5c67253 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/WalkRemoteObjectDatabase.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/WalkRemoteObjectDatabase.java
@@ -348,7 +348,7 @@ void writeInfoPacks(Collection<String> packNames) throws IOException {
 	/**
 	 * Open a buffered reader around a file.
 	 * <p>
-	 * This method is suitable for for reading line-oriented resources like
+	 * This method is suitable for reading line-oriented resources like
 	 * <code>info/packs</code>, <code>info/refs</code>, and the alternates list.
 	 *
 	 * @return a stream to read from the file. Never null.