gh-133286: add explanation about seq for pathlib Pattern Language (G…

…H-133340) (cherry picked from commit ac8df4b) Co-authored-by: alexey semenyuk <alexsemenyuk88@gmail.com>
python · barneygale · May 16, 2025 · May 16, 2025 · May 16, 2025 · 0319f2c370a262b8dc300d5e77cd275bc160be49
commit 0319f2c370a262b8dc300d5e77cd275bc160be49
@@ -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 ``"?"``.