fix(i18n/fr): reject comma as gender/Corsica suffix in fr_ssn

The SSN regex used the character classes [1,2] and 2[A,B], which also
match a literal comma. fr_ssn(', 84 12 76 451 089') was therefore
accepted as valid. Drop the commas ([12] and [AB]); valid SSNs are
unaffected.

Author: Jordan-Bourillot

src/validators/i18n/fr.py

@@ -13,10 +13,10 @@
 def _ssn_pattern():
     """SSN Pattern."""
     return re.compile(
-        r"^([1,2])"  # gender (1=M, 2=F)
+        r"^([12])"  # gender (1=M, 2=F)
         r"\s(\d{2})"  # year of birth
         r"\s(0[1-9]|1[0-2])"  # month of birth
-        r"\s(\d{2,3}|2[A,B])"  # department of birth
+        r"\s(\d{2,3}|2[AB])"  # department of birth
         r"\s(\d{2,3})"  # town of birth
         r"\s(\d{3})"  # registration number
         r"(?:\s(\d{2}))?$",  # control key (may or may not be provided)

tests/i18n/test_fr.py

@@ -34,6 +34,7 @@ def test_returns_true_on_valid_ssn(value: str):
         (None,),
         ("",),
         ("3 84 12 76 451 089 46",),  # wrong gender number
+        (", 84 12 76 451 089",),  # comma is not a valid gender (regex char-class bug)
         ("1 84 12 76 451 089 47",),  # wrong control key
         ("1 84 00 76 451 089",),  # invalid month
         ("1 84 13 76 451 089",),  # invalid month