Remove trailing whitespace from all files (#497)

third_party/python/Lib/test/cfgparser.3

@@ -1,6 +1,6 @@
   # INI with as many tricky parts as possible
   # Most of them could not be used before 3.2
-     
+
   # This will be parsed with the following options
     # delimiters = {'='}
     # comment_prefixes = {'#'}
@@ -21,7 +21,7 @@ go = %(interpolate)s
 
 
 [corruption]
-  value = that is 
+  value = that is
 
 
     actually still here
@@ -45,7 +45,7 @@ go = %(interpolate)s
   [another one!]
  even if values are indented like this = seriously
 yes, this still applies to = section "another one!"
-this too = are there people with configurations broken as this? 
+this too = are there people with configurations broken as this?
  beware, this is going to be a continuation
  of the value for
  key "this too"
@@ -63,7 +63,7 @@ interpolate = anything will do
     [tricky interpolation]
       interpolate = do this
       lets = %(go)s
-      
+
     [more interpolation]
       interpolate = go shopping
       lets = %(go)s