Bug in assembler mode

[rustom]

I was writing code in assembly (gas under linux)
Wanted to comment out something and used comment region.

It put semicolons.

I dont know gas very well and I did not think about it.

After a long time of weird behavior in which a file that was only
changed in its 'comments'  was behaving different from one that was
not, I looked at the gas manual and find that semicolon is like in C
-- a statement separator.