Most Efficient Symbol/Letter for Separating Text

Some people don't use mono spaced fonts in their IDE? Are they MAD?

; MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
; This code does something.
; MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM

; WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
; This code does something.
; WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW

; ---------------------------------------
; This code does something.
; ---------------------------------------

The last is clearly the most readable.


I guess if you want something more efficient than M and more readable, you could go with tilde:

; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
; This code does something.
; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~