The pattern test method `test_rule_patterns` tests each rule by
fetching two strings from it: `test_good` and `test_bad`. Each
string is then presented as an input file to `custom_check_file`,
which should return True or False.
All lines in a string need to end with `\n`. Since the linter
expects an additional newline at the end of a file, the test case
adds `\n` to each string on top of that.
Fixes#6320.
This directory contains scripts that are used in building, managing,
testing, and other forms of work in a Zulip development environment.
Note that tools that are also useful in production belong in
scripts/ or should be Django management commands.
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