Merge pull request #415 from sigmavirus24/patch-1

Add W503 to the error code table in the docs

Author: IanLee1521

docs/intro.rst

@@ -392,6 +392,11 @@ This is the current list of error and warning codes:
 | W391     | blank line at end of file                                            |
 +----------+----------------------------------------------------------------------+
 +----------+----------------------------------------------------------------------+
+| **W5**   | *Line break warning*                                                 |
++----------+----------------------------------------------------------------------+
+| W503     | line break occurred before a binary operator                         |
++----------+----------------------------------------------------------------------+
++----------+----------------------------------------------------------------------+
 | **W6**   | *Deprecation warning*                                                |
 +----------+----------------------------------------------------------------------+
 | W601     | .has_key() is deprecated, use 'in'                                   |