More regexp corrections and tweaks

Problems reported by Mattias Engdegård in:
https://lists.gnu.org/r/emacs-devel/2019-03/msg00247.html
* lisp/align.el (align-rules-list):
* lisp/comint.el (comint-output-filter):
* lisp/language/china-util.el (encode-hz-region):
* lisp/progmodes/cperl-mode.el (cperl-indent-exp):
* lisp/progmodes/idlwave.el (idlwave-is-pointer-dereference):
* lisp/progmodes/scheme.el (dsssl-font-lock-keywords):
* lisp/textmodes/texinfmt.el (texinfo-accent-commands):
* test/src/regex-emacs-tests.el (regex-tests-re-even-escapes):
Fix some regular-expression typos.

1 files changed, 1 insertions, 7 deletions

diff --git a/lisp/textmodes/texinfmt.el b/lisp/textmodes/texinfmt.el
index 61c31a511c1..4bfecb48b65 100644
--- a/lisp/textmodes/texinfmt.el
+++ b/lisp/textmodes/texinfmt.el
@@ -552,13 +552,7 @@ if large.  You can use `Info-split' to do this manually."
 
 (defvar texinfo-accent-commands
   (concat
-   "@^\\|"
-   "@`\\|"
-   "@'\\|"
-   "@\"\\|"
-   "@,\\|"
-   "@=\\|"
-   "@~\\|"
+   "@[\"',=^`~]\\|"
    "@OE{\\|"
    "@oe{\\|"
    "@AA{\\|"