refactor: make script more portable with '#!/usr/bin/env bash' shebang
refactor: make script more portable with '#!/usr/bin/env bash' shebang

volker-fr/diff-so-fancy,scottchiefbaker/diff-so-fancy,so-fancy/diff-so-fancy,so-fancy/diff-so-fancy,volker-fr/diff-so-fancy,scottchiefbaker/diff-so-fancy