support variable arguments, for subcommands like "tldr git checkout"

[benatkin]

tldr tldr shows tldr git checkout as an option:

➜  components git:(develop) ✗ tldr tldr

  Simplified man pages.

  Get typical usages of a command (hint: this is how you got here!):

      tldr command

  Show the tar tldr page for linux:

      tldr -p linux tar

  Get help for a git subcommand:

      tldr git checkout

➜  components git:(develop) ✗

tldr git checkout doesn't work:

➜  components git:(develop) ✗ tldr tealdeer
Page tealdeer not found in cache
Try updating with `tldr --update`, or submit a pull request to:
https://github.com/tldr-pages/tldr
➜  components git:(develop) ✗

Poking around, tldr git-checkout works:

➜  components git:(develop) ✗ tldr git-checkout

  Checkout a branch or paths to the working tree.
  Homepage: <https://git-scm.com/docs/git-checkout>.

  Create and switch to a new branch:

      git checkout -b branch_name

  Create and switch to a new branch based on a specific reference (branch, remote/branch, tag are examples of valid references):

      git checkout -b branch_name reference

  Switch to an existing local branch:

      git checkout branch_name

  Switch to an existing remote branch:

      git checkout --track remote_name/branch_name

  Discard all unstaged changes in the current directory (see `git reset` for more undo-like commands):

      git checkout .

  Discard unstaged changes to a given file:

      git checkout file_name

  Replace a file in the current directory with the version of it committed in a given branch:

      git checkout branch_name -- file_name

➜  components git:(develop) ✗

I think that perhaps if there are variable arguments they get joined together with a dash. It would be nice if everything tldr tldr worked with tealdeer :)

[dbrgn]

This was implemented a while ago in #75 (tealdeer 1.2.0).