Rollup merge of #126818 - estebank:suggestions-fix, r=wesleywiser

Better handle suggestions for the already present code and fix some suggestions

When a suggestion part is for code that is already present, skip it. If all the suggestion parts for a suggestion are for code that is already there, do not emit the suggestion.

Fix two suggestions that treat `span_suggestion` as if it were `span_help`.

Author: matthiaskrgr