From: Samir Benmendil <me@rmz.io>
Date: Sat, 13 Jan 2018 21:59:14 +0000 (+0000)
Subject: Read two arguments from commandline
X-Git-Url: https://git.rmz.io/my-scheme.git/commitdiff_plain/5bd76ea90313c3b469e1b7fce192f3cd54c57a33?hp=5bd76ea90313c3b469e1b7fce192f3cd54c57a33

Read two arguments from commandline

`!!` is the "list indexing" operator. It returns the value in the list
on the lhs at the index on the rhs.

`++` concatenates two lists.

A string is a list of chars.
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