96e6cbe22f
As described in the last commit's log message, ${parameter_name_pattern]
explicitly matches positional parameters but ${parameters[$MATCH]}
expands to nothing in that case (when, e.g., [[ $MATCH == '1' ]]; note
this is equality of strings, not integers).
As a side effect, this removes the dependency on the zsh/parameter
module for expanding parameters.
zsh-syntax-highlighting / highlighters
Navigate into the individual highlighters' documentation to see
what styles ($ZSH_HIGHLIGHT_STYLES keys) each highlighter defines.
Refer to the documentation on highlighters for further information.