Useful Emacs commands (for cleaning up WowchatLog.txt)
M-x flush-lines
Delete each line that contains a match for REGEXP, operating on
the text after point. In Transient Mark mode, if the region is
active, the command operates on the region instead.
e.g. M-x flush-lines
removes lines logged from Trade channel
M-x keep-lines
Delete each line that _does not_ contain a match for REGEXP,
operating on the text after point. In Transient Mark mode, if the
region is active, the command operates on the region instead.
e.g. M-x keep-lines
keeps only lines from Officer chat and from Guild chat