Remove newline after "Options" in help output

[jaredpetersen]

From @mojavelinux in PR #853:

Another thing I've noticed is that commander.js adds a blank line after the category (such as options and commands). Most commands I use don't include this extra line.

commander.js:

Options:

  -v, --version                  output the version number

other commands

Options:
  -v, --version                  output the version number

[mojavelinux]

For reference, here are the commands where I observe the described behavior:

grep, sed, awk, docker, firefox, wget, vim, gulp, mvn, node, ruby, zsh

[mojavelinux]

I'm actually having a hard time finding a command which uses a blank line that otherwise has fairly clean usage text. (There are a lot of commands which have completely disorganized usage text, so I'm ignoring those commands).

[mojavelinux]

Thanks for fixing this @jaredpetersen and @vanesyan for merging. Nice work!