Rename retcode to returncode to be consistent with subprocess.

trychange.py

Index: trychange.py
diff --git a/trychange.py b/trychange.py
index 7cd90b9b0696302bd6584c8bb099a763e1575645..f1ea12ddcc8a47bc45bbdec15746f3f21b1f127c 100755
--- a/trychange.py
+++ b/trychange.py
@@ -430,10 +430,10 @@ def GuessVCS(options, path):
                             real_path)
     return GIT(options, path)
   except gclient_utils.CheckCallError, e:
-    if e.retcode != errno.ENOENT and e.retcode != 128:
+    if e.returncode != errno.ENOENT and e.returncode != 128:
       # ENOENT == 2 = they don't have git installed.
       # 128 = git error code when not in a repo.
-      logging.warn(e.retcode)
+      logging.warn(e.returncode)

[bradn, 2010/09/03 20:31:02]

Maybe a real message?

       raise
   raise NoTryServerAccess("Could not guess version control system. "
                           "Are you in a working copy directory?")