check-code: lift the ban on 'next()'

check-code: lift the ban on 'next()'

'next' is supported by Python2.6 the new lowest version supported by Mercurial.

--- a/contrib/check-code.py	Sun May 17 17:45:47 2015 -0700
+++ b/contrib/check-code.py	Sun May 17 17:47:42 2015 -0700
@@ -217,8 +217,6 @@
     (r'(\w|\)),\w', "missing whitespace after ,"),
     (r'(\w|\))[+/*\-<>]\w', "missing whitespace in expression"),
     (r'^\s+(\w|\.)+=\w[^,()\n]*$', "missing whitespace in assignment"),
-    (r'(?<!def)(\s+|^|\()next\(.+\)',
-     'no next(foo) in Python 2.4 and 2.5, use foo.next() instead'),
     (r'(\s+)try:\n((?:\n|\1\s.*\n)*?)\1\s*yield\b.*?'
      r'((?:\n|\1\s.*\n)+?)\1finally:',
      'no yield inside try/finally in Python 2.4'),

--- a/tests/test-check-code.t	Sun May 17 17:45:47 2015 -0700
+++ b/tests/test-check-code.t	Sun May 17 17:47:42 2015 -0700
@@ -22,13 +22,6 @@
   > if any():
   >     x = all()
   >     y = format(x)
-  >     # next(generator) is new in 2.6
-  >     z = next(x)
-  >     # but generator.next() is okay
-  >     x.next()
-  >     # and we can make our own next
-  >     def next(stuff):
-  >         pass
   > 
   > # Do not complain about our own definition
   > def any(x):
@@ -101,13 +94,10 @@
   ./non-py24.py:4:
    >     y = format(x)
    any/all/format not available in Python 2.4
-  ./non-py24.py:6:
-   >     z = next(x)
-   no next(foo) in Python 2.4 and 2.5, use foo.next() instead
-  ./non-py24.py:35:
+  ./non-py24.py:28:
    >     try:
    no yield inside try/finally in Python 2.4
-  ./non-py24.py:40:
+  ./non-py24.py:33:
    >     try:
    no yield inside try/finally in Python 2.4
   ./classstyle.py:4: