bpo-38605: bump the magic number for 'annotations' future (#22630)

Author: isidentical

Lib/importlib/_bootstrap_external.py

@@ -277,6 +277,7 @@ def _write_atomic(path, data, mode=0o666):
 # Python 3.9a2 3423 (add IS_OP, CONTAINS_OP and JUMP_IF_NOT_EXC_MATCH bytecodes #39156)
 # Python 3.9a2 3424 (simplify bytecodes for *value unpacking)
 # Python 3.9a2 3425 (simplify bytecodes for **value unpacking)
+# Python 3.10a1 3430 (Make 'annotations' future by default)
 
 #
 # MAGIC must change whenever the bytecode emitted by the compiler may no
@@ -286,7 +287,7 @@ def _write_atomic(path, data, mode=0o666):
 # Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
 # in PC/launcher.c must also be updated.
 
-MAGIC_NUMBER = (3425).to_bytes(2, 'little') + b'\r\n'
+MAGIC_NUMBER = (3430).to_bytes(2, 'little') + b'\r\n'
 _RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little') # For import.c
 
 _PYCACHE = '__pycache__'