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/ui/command_line.py b/libbe/ui/command_line.py
index ce0e55e..6eead67 100755
--- a/libbe/ui/command_line.py
+++ b/libbe/ui/command_line.py
@@ -259,7 +259,7 @@ def main():
     if options['no-pager'] == True:
         paginate = 'never'
     libbe.ui.util.pager.run_pager(paginate)
-    
+
     command_name = args[0]
     try:
         module = libbe.command.get_command(command_name)