[git-index] add recent commit messages into completion suggestions even without changelists

IDEA-253961

(cherry picked from commit fbc713862397254d9d26def48763d70b2c8f2ee3)

GitOrigin-RevId: 8b4c23cc246f616d05b085e85404f2c6d9d933c5

platform/vcs-impl/src/com/intellij/openapi/vcs/CommitCompletionContributor.java

@@ -54,9 +54,6 @@ public class CommitCompletionContributor extends CompletionContributor {
     result.stopHere();
     int count = parameters.getInvocationCount();
 
-    List<ChangeList> lists = commitMessage.getChangeLists();
-    if (lists.isEmpty()) return;
-
     String prefix = TextFieldWithAutoCompletionListProvider.getCompletionPrefix(parameters);
     if (count == 0 && prefix.length() < 5) {
       result.restartCompletionOnPrefixChange(StandardPatterns.string().withLength(5));
@@ -65,7 +62,7 @@ public class CommitCompletionContributor extends CompletionContributor {
     CompletionResultSet resultSet = result.caseInsensitive().withPrefixMatcher(
       count == 0 ? new PlainPrefixMatcher(prefix, true) : new CamelHumpMatcher(prefix));
     CompletionResultSet prefixed = result.withPrefixMatcher(new PlainPrefixMatcher(prefix, count == 0));
-    for (ChangeList list : lists) {
+    for (ChangeList list : commitMessage.getChangeLists()) {
       ProgressManager.checkCanceled();
       for (Change change : list.getChanges()) {
         ProgressManager.checkCanceled();