fix issues reported by pep8

The following issues that were reported by the pep8 style check
script have been fixed:

ircbot.py:19:65: E502 the backslash is redundant between brackets
ircbot.py:20:20: E128 continuation line under-indented for visual indent
ircbot.py:80:38: E261 at least two spaces before inline comment
ircbot.py:81:22: E261 at least two spaces before inline comment

Signed-off-by: Magnus Karlsson <noreply@noreply.com>