Add example to readme for reusing numbered variables? about scmpuff HOT 2 CLOSED

You can see some usage in the git wrapper shell script:
https://github.com/mroth/scmpuff/blob/master/commands/inits/data/git_wrapper.sh

I'm guessing for this, you might want to make a vim shell wrapper with something like:

eval "$(scmpuff expand -- "$EDITOR" "$@")"

Play around with the scmpuff expand command to get some ideas. It basically takes a string and tries to expand any numbers into the corresponding file path if an env var is set. In the example above, the -- separates the flags from what gets passed to the command. E.g.

scmpuff expand -- vim foo.txt will output vim foo.txt, but scmpuff expand -- vim 2 3 would output the string vim filename1.c filename2.h. In a bash/zsh shell script, you'd then want to eval that to execute it as a command.

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Closing for now since it appears resolved, but if you want to author a guide for the README or some such, I'll gladly review a PR.

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