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Created attachment 146431 [details] Lightbulb with info sign Currently, for both warnings (e.g. "Field hides another field") and (suggestion) hints (e.g. "Can use functional operations") the same icon (i.e. lightbulb with exclamation mark) is used. But it would be good to make a clear, visual distinction between true warnings for... - code that is potentially buggy (e.g. mistakingly re-use a variable name and thus hiding another one) and - hints for code that might be improved by newer language features (e.g. replace for-loops with functional operations). So keep the current icon for the warning and use perhaps a light bulb combined with a information icon for the hints. I have attached a proposal for that icon.