Don't run presubmit checks on python276_bin.

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index f75b8e11ec2fcf103e4fa4fd68391dd1723f8193..228b6bb0062c65f7867c50ff70b264c53d82eb39 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -15,8 +15,7 @@ def CommonChecks(input_api, output_api, tests_to_black_list):
   black_list = list(input_api.DEFAULT_BLACK_LIST) + [
       r'^cpplint\.py$',
       r'^cpplint_chromium\.py$',
-      r'^python275_bin[\/\\].+',
-      r'^python_bin[\/\\].+',
+      r'^python.*_bin[\/\\].+',

[Isaac (away), 2013/12/11 19:05:15]

multiple .*'s considered harmful.  is this always a number?  if so lets use \d*,
else you could use [^_]* or [0-9a-z]*

Actually I'm not even sure the trailing .+'s are needed but we can leave them

[Daniel Bratell, 2013/12/12 08:21:58]

I don't know anything except that people obviously forget to update this
whenever they update the python version. Maybe it will always be a number. Maybe
it won't. I choose to not just change 275 to 276 to avoid the same problem
happening again next time.

And while multiple branching points (like .*) could cause fun O(n^2) or worse
behaviour that only happens if you have a pretty naive regexp engine with a
simple backtracker, no optimizations and highly redundant, and carefully crafted
input so I wouldn't worry about it. (It's fun the things you learn by working on
a web browser for a while. ).

But I'll change it to \d and we can discuss regexp engines over a beer some
time. :-)

       r'^site-packages-py[0-9]\.[0-9][\/\\].+',
       r'^svn_bin[\/\\].+',
       r'^testing_support[\/\\]_rietveld[\/\\].+']