reword introduction to shebangs

a shebang is not the line, just the character sequence.
also it doesn't matter that much, so we may as well be brief.
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Valentin Gagarin 2023-03-17 01:14:03 +01:00 committed by GitHub
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@ -27,8 +27,7 @@ With Nix, we can declare all dependencies explicitly, and produce a script that
## The script
A [shebang] is the first line of a script starting with `#!`.
It determines which program to use for running the script.
A [shebang] determines which program to use for running an interpreted script.
[Bash]: https://www.gnu.org/software/bash/
[shebang]: https://en.wikipedia.org/wiki/Shebang_(Unix)