prezto_config/modules/utility/functions/wdiff

#
# Highlights wdiff output.
#
# Authors:
#   Sorin Ionescu <sorin.ionescu@gmail.com>
#

function wdiff {
  if zstyle -t ':omz:module:utility:wdiff' color; then
    if (( $+commands[wdiff] )); then
      command wdiff \
        --avoid-wraps \
        --start-delete="$(print -n $FG[red])" \
        --end-delete="$(print -n $FG[none])" \
        --start-insert="$(print -n $FG[green])" \
        --end-insert="$(print -n $FG[none])" \
        "$@" \
      | sed 's/^\(@@\( [+-][[:digit:]]*,[[:digit:]]*\)\{2\} @@\)$/;5;6m\10m/g'
    elif (( $+commands[git] )); then
      git --no-pager diff --color=auto --no-ext-diff --no-index --color-words "$@"
    fi
  else
    command wdiff "$@"
  fi
}

wdiff "$@"