Allow numbers in checker names. (#3667)

This fixes #3666.

CONTRIBUTORS.txt

@@ -385,3 +385,5 @@ contributors:
 * Damien Baty: contributor
 
 * Daniel R. Neal (danrneal): contributer
+
+* Jeremy Fleischman (jfly): contributer

ChangeLog

@@ -6,6 +6,10 @@ What's New in Pylint 2.6.0?
 ===========================
 Release date: TBA
 
+* Fix a regression where disable comments that have checker names with numbers in them are not parsed correctly
+
+  Close #3666
+
 * bad-continuation and bad-whitespace have been removed, black or another formatter can help you with this better than Pylint
 
   Close #246, #289, #638, #747, #1148, #1179, #1943, #2041, #2301, #2304, #2944, #3565

pylint/utils/pragma_parser.py

@@ -39,7 +39,7 @@
 
 TOKEN_SPECIFICATION = [
     ("KEYWORD", r"\b({:s})\b".format(ALL_KEYWORDS)),
-    ("MESSAGE_STRING", r"[A-Za-z\-\_]{2,}"),  #  Identifiers
+    ("MESSAGE_STRING", r"[0-9A-Za-z\-\_]{2,}"),  #  Identifiers
     ("ASSIGN", r"="),  #  Assignment operator
     ("MESSAGE_NUMBER", r"[CREIWF]{1}\d*"),
 ]

tests/test_pragma_parser.py

@@ -16,6 +16,14 @@ def test_simple_pragma():
         assert pragma_repr.messages == ["missing-docstring"]
 
 
+def test_disable_checker_with_number_in_name():
+    comment = "#pylint: disable = j3-custom-checker"
+    match = OPTION_PO.search(comment)
+    for pragma_repr in parse_pragma(match.group(2)):
+        assert pragma_repr.action == "disable"
+        assert pragma_repr.messages == ["j3-custom-checker"]
+
+
 def test_simple_pragma_no_messages():
     comment = "#pylint: skip-file"
     match = OPTION_PO.search(comment)