Fix bounds during comment syntax propertization

Closes GH-327

CHANGES.md

@@ -119,6 +119,8 @@
     -   Do not fail displaying inline images on empty links. ([GH-320][])
     -   Fix off-by-one error in `markdown-inline-code-at-pos`.
         ([GH-313][])
+    -   Fix bounds during inline comment syntax propertization. ([GH-327][])
+
   [gh-349]: https://github.com/jrblevin/markdown-mode/issues/349]
   [gh-171]: https://github.com/jrblevin/markdown-mode/issues/171
   [gh-216]: https://github.com/jrblevin/markdown-mode/issues/216
@@ -163,6 +165,7 @@
   [gh-317]: https://github.com/jrblevin/markdown-mode/pull/317
   [gh-320]: https://github.com/jrblevin/markdown-mode/pull/320
   [gh-322]: https://github.com/jrblevin/markdown-mode/pull/322
+  [gh-327]: https://github.com/jrblevin/markdown-mode/issues/327
   [gh-331]: https://github.com/jrblevin/markdown-mode/issues/331
   [gh-335]: https://github.com/jrblevin/markdown-mode/pull/335
   [gh-340]: https://github.com/jrblevin/markdown-mode/issues/340

markdown-mode.el

@@ -1603,7 +1603,8 @@ region of a YAML metadata block as propertized by
 
 (defun markdown-syntax-propertize-comments (start end)
   "Match HTML comments from the START to END."
-  (let* ((in-comment (nth 4 (syntax-ppss))))
+  (let* ((in-comment (nth 4 (syntax-ppss)))
+         (comment-begin (nth 8 (syntax-ppss))))
     (goto-char start)
     (cond
      ;; Comment start
@@ -1617,10 +1618,9 @@ region of a YAML metadata block as propertized by
         (markdown-syntax-propertize-comments
          (min (1+ (match-end 0)) end (point-max)) end)))
      ;; Comment end
-     ((and in-comment
+     ((and in-comment comment-begin
            (re-search-forward markdown-regex-comment-end end t))
-      (let ((comment-end (match-end 0))
-            (comment-begin (nth 8 (syntax-ppss))))
+      (let ((comment-end (match-end 0)))
         (put-text-property (1- comment-end) comment-end
                            'syntax-table (string-to-syntax ">"))
         ;; Remove any other text properties inside the comment