Fix SuperFence pattern should require options to be separated by a sp…

…ace (#2480)

docs/src/markdown/about/changelog.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 10.11.2
+
+-   **FIX**: SuperFences: Fix a regression where certain patterns could cause a hang.
+
 ## 10.11.1
 
 -   **Fix**: SuperFences: Fix regression where an omitted language in conjunction with options in the fenced header

pymdownx/__meta__.py

@@ -185,5 +185,5 @@ def parse_version(ver, pre=False):
     return Version(major, minor, micro, release, pre, post, dev)
 
 
-__version_info__ = Version(10, 11, 1, "final")
+__version_info__ = Version(10, 11, 2, "final")
 __version__ = __version_info__._get_canonical()

pymdownx/superfences.py

@@ -46,10 +46,10 @@
     (?P<fence>~{3,}|`{3,})
     (?:[ \t]*\.?(?P<lang>[\w#.+-]+)(?=[\t ]|$))?                                           # Language
     (?:
-        [ \t]*(\{(?P<attrs>[^\n]*)\}) |                                         # Optional attributes or
+        [ \t]*(\{(?P<attrs>[^\n]*)\}) |                                                    # Optional attributes or
         (?P<options>
             (?:
-                (?:[ \t]*[a-zA-Z][a-zA-Z0-9_]*(?:=(?P<quot>"|').*?(?P=quot))?)  # Options
+                (?:[ \t]*[a-zA-Z][a-zA-Z0-9_]*(?:=(?P<quot>"|').*?(?P=quot))?)(?=[\t ]|$)  # Options
             )+
         )
     )?[ \t]*$

tests/test_extensions/test_superfences.py

@@ -714,6 +714,17 @@ def test_attrs_alternate_form(self):
             True
         )
 
+    def test_issue_2479(self):
+        """Test issue #2479."""
+
+        self.check_markdown(
+            """```test_test_test_test_test_test_test_test``` test test.""",
+            """
+            <p><code>test_test_test_test_test_test_test_test</code> test test.</p>
+            """,
+            True
+        )
+
 
 class TestSuperFencesClassesIdsAttrList(util.MdCase):
     """Test fence ids and classes with attribute lists."""