v3.15.0b3
[3.15] gh-150207: Raise MemoryError on tokenizer allocation failure instead of crashing (GH-150275) (#150996)
[3.15] gh-151461: Fix encoding-related exception handling in file tokenizer (GH-151462) (GH-151470)
gh-145234: Normalize decoded CR in string tokenizer (#145281)
gh-104169: Refactor tokenizer into lexer and wrappers (#110684)