builtin-remote: Fix missing newline at end of listing of pushed branches

Without this the output of 'git remote show' does not end with a new-line:

bash> git remote show repo
* remote repo
  URL: repo.or.cz:/srv/git/kdbg.git
  Tracked remote branches
    maint master mob
  Local branch pushed with 'git push'
    +master:masterbash>

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Acked-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-remote.c

@@ -472,6 +472,7 @@ static int show_or_prune(int argc, const char **argv, int prune)
 					spec->dst ? ":" : "",
 					skip_prefix(spec->dst, "refs/heads/"));
 			}
+			printf("\n");
 		}
 cleanup_states:
 		/* NEEDSWORK: free remote */