gclient: print a warning if a dep would get deleted or moved in the future

BUG=skia:1638

Review URL: https://codereview.chromium.org/189913020

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@262761 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/scm.py b/scm.py
index d53b4f4..4703e61 100644
--- a/scm.py
+++ b/scm.py
@@ -171,7 +171,7 @@
 
   @staticmethod
   def IsGitSvn(cwd):
-    """Returns true if this repo looks like it's using git-svn."""
+    """Returns True if this repo looks like it's using git-svn."""
     # If you have any "svn-remote.*" config keys, we think you're using svn.
     try:
       GIT.Capture(['config', '--local', '--get-regexp', r'^svn-remote\.'],