Sometimes a finding is correct but you do not want to act on it. Add a #nolint comment at the end of the line the finding points at. The test project's src/main.nim uses the marker on three of its variables:
var a: int ok: int #nolint b = 5 #nolint because reasons c = 6 #nolint
Only a is reported. ok is suppressed by the marker, b is not suppressed because the marker is not at the end of the line, and c is suppressed even though the marker is followed by trailing whitespace. The comment applies to that line only, and to every finding on it, regardless of which check produced it.
Note:
Suppression is for the occasional exception. If you find yourself adding #nolint to many lines, the rule is probably wrong for your project: change the check's settings, or exclude the directory in the config instead.