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/encoding.py b/libbe/util/encoding.py
index dcc41f8..7706105 100644
--- a/libbe/util/encoding.py
+++ b/libbe/util/encoding.py
@@ -72,7 +72,7 @@ def get_file_contents(path, mode='r', encoding=None, decode=False):
             encoding = get_filesystem_encoding()
         f = codecs.open(path, mode, encoding)
     else:
-        f = open(path, mode) 
+        f = open(path, mode)
     contents = f.read()
     f.close()
     return contents