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, 1 insertions, 1 deletions

diff --git a/libbe/util/plugin.py b/libbe/util/plugin.py
index 982c5ca..0326cda 100644
--- a/libbe/util/plugin.py
+++ b/libbe/util/plugin.py
@@ -57,7 +57,7 @@ def modnames(prefix):
     >>> 'plugin' in [n for n in modnames('libbe.util')]
     True
     """
-    components = prefix.split('.')    
+    components = prefix.split('.')
     modfiles = os.listdir(os.path.join(_PLUGIN_PATH, *components))
     modfiles.sort()
     for modfile in modfiles: