Fix highlighting of commands#1

Open

MichaWiedenmann wants to merge 3 commits intovim-scripts:masterfrom

MichaWiedenmann:master

Commits on Mar 19, 2018

replace '[\s\t] with [[:blank:]]'
Micha Wiedenmann
committed
Escape '.' in keywords
Micha Wiedenmann
committed
enclose commands by '\<', '\>'
Micha Wiedenmann
committed