check-code: examine magic pattern matching against contents of a file Before this patch, check-code examines "magic" pattern (e.g. '^#!.*python') matching against not contents of a file, but name of it. This unintentionally omits code checking against Python source file, of which filename doesn't end with "*.py" or "*.cgi", even though contents of it starts with "#!/bin/python" or so. In this change, 'pre' refers contents of file 'f'.

docchecker: use indentation of 4 spaces This is fixing for 'must indent 4 spaces' check-code rule. check-code has overlooked this, because a file isn't recognized as one to be checked (this problem is fixed by subsequent patch).

docchecker: remove naked except clause This is fixing for 'naked except clause' check-code rule. check-code has overlooked this, because a file isn't recognized as one to be checked (this problem is fixed by subsequent patch).