Filter MERGE_LIST magic file from Prolog facts

MERGE_LIST is magic file just like COMMIT_MSG.  Using the general
isMagic function to filter out the paths.

Change-Id: I4799817d24f770f0e76874b499de653b970320e4
diff --git a/java/gerrit/PRED_commit_delta_4.java b/java/gerrit/PRED_commit_delta_4.java
index 7c26632..d2634ea 100644
--- a/java/gerrit/PRED_commit_delta_4.java
+++ b/java/gerrit/PRED_commit_delta_4.java
@@ -102,7 +102,7 @@
         String oldName = patch.getOldName();
         Patch.ChangeType changeType = patch.getChangeType();
 
-        if (newName.equals("/COMMIT_MSG")) {
+        if (Patch.isMagic(newName)) {
           continue;
         }
 
diff --git a/java/gerrit/PRED_commit_edits_2.java b/java/gerrit/PRED_commit_edits_2.java
index c196026..f46a6487 100644
--- a/java/gerrit/PRED_commit_edits_2.java
+++ b/java/gerrit/PRED_commit_edits_2.java
@@ -14,6 +14,7 @@
 
 package gerrit;
 
+import com.google.gerrit.reviewdb.client.Patch;
 import com.google.gerrit.server.patch.PatchList;
 import com.google.gerrit.server.patch.PatchListEntry;
 import com.google.gerrit.server.patch.Text;
@@ -90,7 +91,7 @@
         String newName = entry.getNewName();
         String oldName = entry.getOldName();
 
-        if (newName.equals("/COMMIT_MSG")) {
+        if (Patch.isMagic(newName)) {
           continue;
         }