Revert "Check for empty $TMUX variable"
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@ -9,7 +9,7 @@
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" Docs on mapping fast escape codes in vim
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" http://vim.wikia.com/wiki/Mapping_fast_keycodes_in_terminal_Vim
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function! WrapForTmux(s)
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if empty('$TMUX')
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if !exists('$TMUX')
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return a:s
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endif
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