Fix debbugs#16971

* 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.

1 files changed, 10 insertions, 0 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index cf42e8ccef6..5f348fbc499 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,13 @@
+2014-03-17  Dmitry Gutov  <dgutov@yandex.ru>
+
+        * 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).  (Bug#16971)
+
+        * progmodes/scheme.el (scheme-mode-variables): Same.
+
 2014-03-16  Martin Rudalics  <rudalics@gmx.at>
 
         Fix behavior of with-temp-buffer-window (Bug#16816, Bug#17007).