179b8e753f
This is a prerequisite for the next commit. The incumbent code was wrong: the test of $in_redirection in the first hunk would never have seen «(( in_redirection == 2 ))». That had no visible effect since options to sudo don't look like redirection operators.
zsh-syntax-highlighting / highlighters
Navigate into the individual highlighters' documentation to see
what styles ($ZSH_HIGHLIGHT_STYLES
keys) each highlighter defines.
Refer to the documentation on highlighters for further information.