nojhan/liquidprompt — pull request #168 by dolmen (2013-05-04 22:40:55+00:00)
Title: Optimize _lp_sr, _lp_sl, _lp_sb

Simplifiy expressions in `_lp_sr`, `_lp_sl`, `_lp_sb`.
Fix usage of `[[ ! -z ...]]` by replacing it with `[[ -n ... ]]`.