Config: add tests for setting --extensions
#872
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Description
Includes minor bug fix to treat an empty value correctly.
Previously, passing
--extensions=
(without value) would result in theConfig::$extensions
property being set to:Now, an empty value will set the extensions array to an empty array.
Note: in practice, the above change will not make a difference in how files are filtered/scanned.
👉 The change to the
Config
class will be most straight-forward to review while ignoring whitespace changes.Suggested changelog entry
N/A