GitLab

* lisp/emacs-lisp/lisp-mode.el (lisp-mode-variables): Set
`comment-use-syntax' to t to avoid the unnecessary runtime check.
Set `comment-start-skip' to a simpler value that doesn't try to
check if the semicolon is escaped (this is handled by
`syntax-ppss' now). 

* lisp/progmodes/scheme.el (scheme-mode-variables): Same.