Merge "blame: Format commit and author only once per range"

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Blame.java

@@ -222,19 +222,29 @@ class Blame extends TextBuiltin {
 			String authorFmt = MessageFormat.format(" (%-{0}s %{1}s", //$NON-NLS-1$
 					valueOf(authorWidth), valueOf(dateWidth));
 
-			for (int line = begin; line < end; line++) {
-				outw.print(abbreviate(blame.getSourceCommit(line)));
+			for (int line = begin; line < end;) {
+				RevCommit c = blame.getSourceCommit(line);
+				String commit = abbreviate(c);
+				String author = null;
+				String date = null;
+				if (!noAuthor) {
+					author = author(line);
+					date = date(line);
+				}
+				do {
+					outw.print(commit);
 					if (showSourcePath)
 						outw.format(pathFmt, path(line));
 					if (showSourceLine)
 						outw.format(numFmt, valueOf(blame.getSourceLine(line) + 1));
 					if (!noAuthor)
-					outw.format(authorFmt, author(line), date(line));
+						outw.format(authorFmt, author, date);
 					outw.format(lineFmt, valueOf(line + 1));
 					outw.flush();
 					blame.getResultContents().writeLine(outs, line);
 					outs.flush();
 					outw.print('\n');
+				} while (++line < end && blame.getSourceCommit(line) == c);
 			}
 		} finally {
 			generator.release();