Fix a highlight issue

Fix an issue where Highlight can override another extension in the
"registered" list in Python Markdown.

Author: facelessuser

docs/src/markdown/about/changelog.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 10.17.1
+
+-   **FIX**: Fix an issue where Highlight can override another extension in the "registered" list in Python Markdown.
+
 ## 10.17
 
 -   **NEW**: Allow specifying static IDs in caption block headers via `#id` syntax.

pymdownx/__meta__.py

@@ -193,5 +193,5 @@ def parse_version(ver: str) -> Version:
     return Version(major, minor, micro, release, pre, post, dev)
 
 
-__version_info__ = Version(10, 17, 0, "final")
+__version_info__ = Version(10, 17, 1, "final")
 __version__ = __version_info__._get_canonical()

pymdownx/blocks/__init__.py

@@ -221,6 +221,7 @@ def register(self, b: type[Block], config: dict[str, Any]) -> None:
             raise ValueError(f'The block name {b.NAME} is already registered!')
         self.blocks[b.NAME] = b
         self.config[b.NAME] = config
+        self.trackers[b.NAME] = {}
 
     def test(self, parent: etree.Element, block: str) -> bool:
         """Test to see if we should process the block."""

pymdownx/highlight.py

@@ -589,6 +589,7 @@ def extendMarkdown(self, md):
             if isinstance(ext, HighlightExtension):
                 register = not ext.enabled and self.enabled
                 break
+            index += 1
 
         if register is None:
             register = True