MNT Simplify inefficient regex (scikit-learn#31603)

Author: lesteve

sklearn/tests/test_min_dependencies_readme.py

@@ -32,9 +32,9 @@ def test_min_dependencies_readme():
     # sklearn/_min_dependencies.py
 
     pattern = re.compile(
-        r"(\.\. \|)"
-        r"(([A-Za-z]+\-?)+)"
-        r"(MinVersion\| replace::)"
+        r"\.\. \|"
+        r"([A-Za-z-]+)"
+        r"MinVersion\| replace::"
         r"( [0-9]+\.[0-9]+(\.[0-9]+)?)"
     )
 
@@ -53,7 +53,7 @@ def test_min_dependencies_readme():
             if not matched:
                 continue
 
-            package, version = matched.group(2), matched.group(5)
+            package, version = matched.group(0), matched.group(1)
             package = package.lower()
 
             if package in dependent_packages: