Clarify completion code logic - no changes needed

[Copilot]

The bot reviewer incorrectly flagged the removal of starts_with checks in completion matching logic as changing behavior. The user (@j178) correctly identified that contains logically subsumes starts_with.

Analysis

The original cleanup was correct:

// Before (redundant)
if id.contains(current_str) || id.starts_with(current_str) {
    uniq.entry(id).or_insert(name);
}

// After (simplified, functionally identical)
if id.contains(current_str) {
    uniq.entry(id).or_insert(name);
}

If a string starts with a prefix, it also contains that prefix, making the starts_with check redundant in contains(x) || starts_with(x) expressions. The same applies to the inverted form: !contains(x) && !starts_with(x) is equivalent to !contains(x).

Resolution

No code changes required. The original PR changes at lines 145, 211, and 258 correctly removed redundant checks. Lines 83 and 128 retain the redundant pattern but are functionally correct.

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