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bpo-32625: Updated documentation for EXTENDED_ARG. (GH-13985) 

Python 3.6 changed the size of bytecode instruction, while the documentation for `EXTENDED_ARG` was not updated accordingly.
(cherry picked from commit 405f648db7)

Co-authored-by: Yao Zuo <laike9m@users.noreply.github.com>
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Miss Islington (bot) 2019-06-11 20:53:58 -07:00 committed by GitHub
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@ -1219,10 +1219,10 @@ All of the following opcodes use their arguments.
.. opcode:: EXTENDED_ARG (ext)
Prefixes any opcode which has an argument too big to fit into the default two
bytes. *ext* holds two additional bytes which, taken together with the
subsequent opcode's argument, comprise a four-byte argument, *ext* being the
two most-significant bytes.
Prefixes any opcode which has an argument too big to fit into the default one
byte. *ext* holds an additional byte which act as higher bits in the argument.
For each opcode, at most three prefixal ``EXTENDED_ARG`` are allowed, forming
an argument from two-byte to four-byte.
.. opcode:: FORMAT_VALUE (flags)