Fix T_ELSE immediately followed by T_COLON

Curently `else:` throws two errors:

1. Space after opening control structure is required (the Coding Standards handbook doesn't say anything on this)
1. No space before opening parenthesis is prohibited (this is just wrong - there is no paranthesis on this line)

This pull request prevents the sniffer from throwing these two errors.

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If my interpretation of 1. is considered correct, I could add a fixable error for `else :`