style: Fix PEP8 blank lines issues in Python files

Done with `autopep8 --select=E3,W3`, fixes:

- E301 - Add missing blank line.
- E302 - Add missing 2 blank lines.
- E303 - Remove extra blank lines.
- E304 - Remove blank line following function decorator.
- E309 - Add missing blank line.
- W391 - Remove trailing blank lines.

modules/regex/config.py

@@ -1,8 +1,9 @@
 #!/usr/bin/env python
 
+
 def can_build(platform):
     return True
 
+
 def configure(env):
     pass
-