(LaTeX patterns): Don't match \( and \[ following a \.

diff --git a/lisp/hilit19.el b/lisp/hilit19.el
index 2bf5f920a4359ee743133dc5c0b64d20b19652c5..eca6d350f2eaf74d86cf0f1cbabd004395ab0a8c 100644 (file)
--- a/lisp/hilit19.el
+++ b/lisp/hilit19.el
@@ -1255,8 +1255,8 @@ number of backslashes."
    ("\\\\caption\\(\\[[^]]*\\]\\)?{" "}" label)
 
    ;; formulas
-   ("\\\\("  "\\\\)" formula)                   ; \( \)
-   ("\\\\\\[" "\\\\\\]" formula)                ; \[ \]
+   ("[^\\]\\\\("  "\\\\)" formula)                   ; \( \)
+   ("[^\\]\\\\\\[" "\\\\\\]" formula)                ; \[ \]
    ("[^$]\\($\\($[^$]*\\$\\|[^$]*\\)\\$\\)" 1 formula) ; '$...$' or '$$...$$'
    
    ;; things that bring in external files