Fixed libbe.command.diff + ugly BugDir.duplicate_bugdir implementation

duplicate_bugdir() works, but for the vcs backends, it could require
shelling out for _every_ file read.  This could, and probably will, be
horribly slow.  Still it works ;).

I'm not sure what a better implementation would be.  The old
implementation checked out the entire earlier state into a temporary
directory
  pros: single shell out, simple upgrade implementation
  cons: wouldn't work well for HTTP backens

I think a good solution would run along the lines of the currently
commented out code in duplicate_bugdir(), where a
  VersionedStorage.changed_since(revision)
call would give you a list of changed files.  diff could work off of
that directly, without the need to generate a whole duplicate bugdir.
I'm stuck on how to handle upgrades though...

Also removed trailing whitespace from all python files.

1 files changed, 2 insertions, 2 deletions

diff --git a/libbe/storage/vcs/git.py b/libbe/storage/vcs/git.py
index 29abda7..8d1b529 100644
--- a/libbe/storage/vcs/git.py
+++ b/libbe/storage/vcs/git.py
@@ -76,7 +76,7 @@ class Git(base.VCS):
     def _vcs_detect(self, path):
         if self._u_search_parent_directories(path, '.git') != None :
             return True
-        return False 
+        return False
 
     def _vcs_root(self, path):
         """Find the root of the deepest repository containing path."""
@@ -154,7 +154,7 @@ class Git(base.VCS):
         except IndexError:
             return None
 
-    
+
 if libbe.TESTING == True:
     base.make_vcs_testcase_subclasses(Git, sys.modules[__name__])