Support \pagebreak[0] for paragraph-separate in latex-mode

* textmodes/tex-mode.el (latex-mode): In 'paragraph-separate' allow
optional argument ('[0]', etc.) for '\pagebreak[0]'.  (Bug#19039)

1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/textmodes/tex-mode.el b/lisp/textmodes/tex-mode.el
index 3d7cc62e265..9b92a2fc60e 100644
--- a/lisp/textmodes/tex-mode.el
+++ b/lisp/textmodes/tex-mode.el
@@ -1139,6 +1139,7 @@ subshell is initiated, `tex-shell-hook' is run."
   ;; A line containing just $$ is treated as a paragraph separator.
   ;; A line starting with $$ starts a paragraph,
   ;; but does not separate paragraphs if it has more stuff on it.
+  ;; For \pagebreak allow latex optional arg like \pagebreak[2]
   (setq paragraph-start
         (concat "[ \t]*\\(\\$\\$\\|"
                 "\\\\[][]\\|"
@@ -1162,7 +1163,7 @@ subshell is initiated, `tex-shell-hook' is run."
                                               "noindent" "newpage" "footnote"
                                               "marginpar" "parbox" "caption"))
                 "\\|\\$\\$\\|[a-z]*\\(space\\|skip\\|page[a-z]*\\)"
-                "\\>\\)[ \t]*\\($\\|%\\)\\)"))
+                "\\>\\)[][0-9 \t]*\\($\\|%\\)\\)"))
   (setq-local imenu-create-index-function #'latex-imenu-create-index)
   (setq-local tex-face-alist tex-latex-face-alist)
   (add-hook 'fill-nobreak-predicate #'latex-fill-nobreak-predicate nil t)