Open any man page (using "man") in Dash.app

.bash_profile

function encodeuri {
  local string="${@}"
  local strlen=${#string}
  local encoded=""

  for (( pos = 0; pos < strlen; pos ++ )); do
    c=${string:$pos:1}
    case "$c" in
      [-_.~a-zA-Z0-9]) o="${c}" ;;
      *) printf -v o '%%%02x' "'$c"
    esac
    encoded+="${o}"
  done
  echo "${encoded}"
}

function man {
  if [[ -d /Applications/Dash.app && \
    -d "$HOME/Library/Application Support/Dash/DocSets/Man_Pages" ]]; then
    /usr/bin/open dash://manpages:`encodeuri ${@}`
  else
    /usr/bin/man ${@}
  fi
}

It opens your man pages directly in Dash app.
Just go and integrate man plugin of Dash app. The plugin would read all pages available on your system. You can also search any Unix/Linux command in Dash app itself.

Or

Above .bash_profile addition would open man pages in Dash directly by hitting command directly in the terminal.

Eg.
$ man ls