Add newlines to info message so words aren't squashed together.

Change-Id: I909b38a4aaa40e9ea8b4d40cababa1274d21e145
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4414305
Auto-Submit: Brian Ryner <bryner@google.com>
Reviewed-by: Joanna Wang <jojwang@chromium.org>
Commit-Queue: Joanna Wang <jojwang@chromium.org>

git_cl.py

@@ -4829,8 +4829,8 @@ def CMDupload(parser, args):
 
   if options.squash and (dogfood_stacked_changes
                          or os.environ.get(DOGFOOD_STACKED_CHANGES_VAR) == '1'):
-    print('Depot Tools no longer sets new uploads to "WIP". Please update the'
-          '"Set new changes to "work in progress" by default" checkbox at'
+    print('Depot Tools no longer sets new uploads to "WIP". Please update the\n'
+          '"Set new changes to "work in progress" by default" checkbox at\n'
           'https://<host>-review.googlesource.com/settings/')
     if options.dependencies:
       parser.error('--dependencies is not available for this workflow.')