Issue #27078: Added BUILD_STRING opcode. Optimized f-strings evaluation.
diff --git a/Lib/importlib/_bootstrap_external.py b/Lib/importlib/_bootstrap_external.py
index 46f1bab..d36e4ac 100644
--- a/Lib/importlib/_bootstrap_external.py
+++ b/Lib/importlib/_bootstrap_external.py
@@ -232,7 +232,8 @@
# Python 3.6a1 3370 (16 bit wordcode)
# Python 3.6a1 3371 (add BUILD_CONST_KEY_MAP opcode #27140)
# Python 3.6a1 3372 (MAKE_FUNCTION simplification, remove MAKE_CLOSURE
- #27095)
+# #27095)
+# Python 3.6b1 3373 (add BUILD_STRING opcode #27078)
#
# MAGIC must change whenever the bytecode emitted by the compiler may no
# longer be understood by older implementations of the eval loop (usually
@@ -241,7 +242,7 @@
# Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
# in PC/launcher.c must also be updated.
-MAGIC_NUMBER = (3372).to_bytes(2, 'little') + b'\r\n'
+MAGIC_NUMBER = (3373).to_bytes(2, 'little') + b'\r\n'
_RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little') # For import.c
_PYCACHE = '__pycache__'