You would like to comment out portions of code for legacy or future use instead of removing it. Appending # at the front of every line is ugly and messes up the indenting. Here is a quick, neat and simple fix...

Attached below is a very basic lint tool whose task is to flag "dangerous" TM1 rules.
For now it is only checking for aliases in rules.

renaming elements without activating aliases? Yes we can!
The dimension editor and dimension worksheets cannot rename elements directly, so let me introduce you to SwapAliasWithPrincipalName.

This a short simple syntax to easily pad zeroes to an index value:

Period = 'Period ' | NumberToStringEx(index, '00','','');

(from olap forums)

Comments allow you to explain, to yourself and/or to your users, what the query is trying to achieve, how it works, who wrote it or amended, etc.

Use "//" or "—" (without the double quotes) to end a line with a comment or to have the comment on its own line.