Check for tmux before checking for screen. #24
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By default, tmux will re-use the screen-* TERM values, which will cause DCS sequences to not get added. The presence of the TMUX environment variable is a stronger signal anyways, so first check whether we're running in tmux, and secondly whether we're running under screen.
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By default, tmux will re-use the screen-* TERM values, which will
cause DCS sequences to not get added. The presence of the TMUX
environment variable is a stronger signal anyways, so first check
whether we're running in tmux, and secondly whether we're running
under screen.