`manual_is_multiple_of` should not trigger on literal divisors

What it does

The manual_is_multiple_of lint triggers on expressions like

if v % 2 == 0 { }

suggesting replacement with

if v.is_multiple_of(2) { }

Proposal: Skip this lint when the divisor is an integer literal.

Advantage

• v % 2 == 0 is an universal idiom across languages and understood immediately
• v.is_multiple_of(2) is longer to type and more complex to read
• Main purpose of is_multiple_of() was probably avoiding panics due to division-by-zero; this does not apply to literal divisors (compile-time validation)

Drawbacks

No response

Example

Trigger on

let a = 2;
if v % a == 0 { }  /// WARNING --> replace by v.is_multiple_of(a)

but not

if v % 2 == 0 { }  /// NO warning

Comparison with existing lints

No response

Additional Context

No response