pgm: Fix missing braces in Describe.run()

Change-Id: I09e777fd4e77869952d2614ac2cde508b96d61e2
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

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

@@ -73,8 +73,9 @@ class Describe extends TextBuiltin {
 	protected void run() {
 		try (Git git = new Git(db)) {
 			DescribeCommand cmd = git.describe();
-			if (tree != null)
+			if (tree != null) {
 				cmd.setTarget(tree);
+			}
 			cmd.setLong(longDesc);
 			cmd.setMatch(patterns.toArray(new String[0]));
 			String result = null;
@@ -83,8 +84,9 @@ class Describe extends TextBuiltin {
 			} catch (RefNotFoundException e) {
 				throw die(CLIText.get().noNamesFound, e);
 			}
-			if (result == null)
+			if (result == null) {
 				throw die(CLIText.get().noNamesFound);
+			}
 
 			outw.println(result);
 		} catch (IOException | InvalidPatternException | GitAPIException e) {