Feature request: change editor's commenting behavior in makefiles

<!-- ⚠️⚠️ Do Not Delete This! feature_request_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- Please search existing issues to avoid creating duplicates. --> <!-- Describe the feature you'd like. --> The commenting function in makefiles can be improved in two manners. 1. Create a makefile and type of a few commands such as: ``` clean: rm -f *.exe *.o ``` 2. When commenting the both lines via ctrl+/, all lines will receive `# ` as a prefix. Note the space. 3. When commenting only the shell script line, the lines will receive `#', on the first line of the shell script The issue with that: - the extra space on generic makefile lines is difficult because it is invisible. When removing the comments manually or in another editor, this introduces errors. - For consistency, comments should always be on the makefile level itself, rather than on the shell script line.