Fix various typos, spelling mistakes, and inconsistencies

Change-Id: If8a00ab24285a32840dc9c92697366037554cbca

Documentation/dev-plugins.txt

diff --git a/Documentation/dev-plugins.txt b/Documentation/dev-plugins.txt
index 9313b8f..71ed460 100644
--- a/Documentation/dev-plugins.txt
+++ b/Documentation/dev-plugins.txt
@@ -457,7 +457,7 @@
 Plugins which define new Events should register them via the
 `com.google.gerrit.server.events.EventTypes.registerClass()`
 method. This will make the EventType known to the system.
-Deserialzing events with the
+Deserializing events with the
 `com.google.gerrit.server.events.EventDeserializer` class requires
 that the event be registered in EventTypes.
 
@@ -657,7 +657,7 @@
 `create()` method of the class implementing the
 `ChangeQueryBuilder.ChangeOperatorFactory` interface returns a
 `Predicate<ChangeData>`.  Here is a sample operator factory
-defintion which creates a `MyPredicate`:
+definition which creates a `MyPredicate`:
 
 [source,java]
 ----
@@ -1394,7 +1394,7 @@
 doesn't have to set `UiAction.Description.setVisible()` explicitly in this
 case.
 
-The following prerequisities must be met, to satisfy the capability check:
+The following prerequisites must be met, to satisfy the capability check:
 
 * user is authenticated
 * user is a member of a group which has the `Administrate Server` capability, or