gh-133286: add explanation about for pathlib Pattern Language

alex-semenyuk · alex-semenyuk · commit 3bb5f7d6da9e · 2025-05-03T16:58:03.000+05:00
diff --git a/Doc/library/pathlib.rst b/Doc/library/pathlib.rst
@@ -1781,9 +1781,12 @@ The following wildcards are supported in patterns for
 ``?``
   Matches one non-separator character.
 ``[seq]``
-  Matches one character in *seq*.
+  Matches one character in *seq*, where *seq* is a sequence of characters. 
+  Range expressions are supported; for example, ``[a-z]`` matches any lowercase ASCII letter.
+  Multiple ranges can be combined: ``[a-zA-Z0-9_]`` matches any ASCII letter, digit, or underscore.
+
 ``[!seq]``
-  Matches one character not in *seq*.
+  Matches one character not in *seq*, where *seq* follows the same rules as above.
 
 For a literal match, wrap the meta-characters in brackets.
 For example, ``"[?]"`` matches the character ``"?"``.
