`LetsConfusion` flags "let's you" as a redundnat pronoun rather than a mistke for "lets you"

> Current macOS Finder let's you name files with a slash in them,

But actually it does offer both corrections "let's" and "lets you". So either the message needs to be improved, or the context might be able to be analyzed to offer only the right suggestion or a varying message depending on the specific case.

Start by reproducing the Finder example and tracing the LetsConfusion diagnostic that reports "let's you". Determine whether the correction message or context-sensitive suggestions are feasible; the issue is done when the reported case no longer presents a misleading choice and the behavior is covered by an appropriate test.

Written by the indexing model from the issue text.