SIFR-LINT-0004: Line ends with trailing horizontal whitespace. - Sifr

SIFR-LINT-0004 belongs to the Policy linting diagnostic family. It means: line ends with trailing horizontal whitespace.

Why It Happens

A suppressible policy rule fired, or a suppression itself is malformed. Fix the policy issue or make the suppression exact and local.

Use sifr --explain SIFR-LINT-0004 locally to see the renderer’s exact message template and any machine-applicable suggestions for the compiler version you are running.

Erroneous Code

# sifr: ignore
def f(flag: bool):
    pass

f(True)

How To Fix It

Fix the policy issue when possible. If suppression is intentional, list the exact policy rule id and keep it local.

Fixed Code

# sifr: ignore SIFR-LINT-0006
def f(flag: bool):
    pass

f(flag=True)

Details

Field	Value
Code	`SIFR-LINT-0004`
Family	`LINT`
Severity	Warning
Stability	stable
Owner	`sifr_lint::rules::trailing_whitespace`
Representative fixture	`crates/sifr_lint/src/lib.rs::suppression_only_suppresses_matching_policy_rule`

See the Error Codes index for the complete catalog.