Caption pattern should match a literal dot (#2717)

Author: facelessuser

docs/src/markdown/about/changelog.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 10.16.1
+
+-   **FIX**: Inefficient regular expression pattern for figure caption numbers.
+
 ## 10.16
 
 -   **NEW**: Add early support for Python 3.14.

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, 16, 0, "final")
+__version_info__ = Version(10, 16, 1, "final")
 __version__ = __version_info__._get_canonical()

pymdownx/blocks/caption.py

@@ -31,7 +31,7 @@
 from markdown.treeprocessors import Treeprocessor
 import re
 
-RE_FIG_NUM = re.compile(r'^(\^)?([1-9][0-9]*(?:.[1-9][0-9]*)*)(?= |$)')
+RE_FIG_NUM = re.compile(r'^(\^)?([1-9][0-9]*(?:\.[1-9][0-9]*)*)(?= |$)')
 RE_SEP = re.compile(r'[_-]+')