diff --git a/hgext/convert/subversion.py b/hgext/convert/subversion.py
--- a/hgext/convert/subversion.py
+++ b/hgext/convert/subversion.py
@@ -280,7 +280,7 @@ class svn_source(converter_source):
         # Check if branches bring a few more heads to the list
         if branches:
             rpath = self.url.strip('/')
-            branchnames = svn.client.ls(rpath + '/' + urllib.quote(branches), 
+            branchnames = svn.client.ls(rpath + '/' + urllib.quote(branches),
                                         rev, False, self.ctx)
             for branch in branchnames.keys():
                 module = '%s/%s/%s' % (oldmodule, branches, branch)
@@ -325,7 +325,7 @@ class svn_source(converter_source):
         else:
             # Perform a full checkout on roots
             uuid, module, revnum = self.revsplit(rev)
-            entries = svn.client.ls(self.baseurl + urllib.quote(module), 
+            entries = svn.client.ls(self.baseurl + urllib.quote(module),
                                     optrev(revnum), True, self.ctx)
             files = [n for n,e in entries.iteritems()
                      if e.kind == svn.core.svn_node_file]
@@ -874,7 +874,7 @@ class svn_source(converter_source):
         path = path.strip('/')
         pool = Pool()
         rpath = '/'.join([self.baseurl, urllib.quote(path)]).strip('/')
-        return ['%s/%s' % (path, x) for x in 
+        return ['%s/%s' % (path, x) for x in
                 svn.client.ls(rpath, optrev(revnum), True, self.ctx, pool).keys()]
 
     def getrelpath(self, path, module=None):
diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -270,7 +270,7 @@ def bisect(ui, repo, rev=None, extra=Non
     Once you have performed tests, mark the working directory as bad
     or good and bisect will either update to another candidate changeset
     or announce that it has found the bad revision.
-    
+
     As a shortcut, you can also use the revision argument to mark a
     revision as good or bad without checking it out first.
     """
diff --git a/mercurial/strutil.py b/mercurial/strutil.py
--- a/mercurial/strutil.py
+++ b/mercurial/strutil.py
@@ -37,5 +37,5 @@ def rsplit(s, sep=None, maxsplit=-1):
     try:
         return s.rsplit(sep, maxsplit)
     except AttributeError:
-        return  [chunk[::-1] for chunk in 
+        return  [chunk[::-1] for chunk in
                  s[::-1].split(sep, maxsplit)[::-1]]
diff --git a/tests/test-doctest.py b/tests/test-doctest.py
--- a/tests/test-doctest.py
+++ b/tests/test-doctest.py
@@ -1,7 +1,7 @@
 # this is hack to make sure no escape characters are inserted into the output
 import os;
 if 'TERM' in os.environ:
-    del os.environ['TERM'] 
+    del os.environ['TERM']
 import doctest
 
 import mercurial.changelog