Arbitrary line shortening for E501?

[amosnier]

Description

It seems that autopep8 (which is great, by the way) 1.6.0, when in vanilla-mode, shortens

        src, obj, cmd = calc_object_cmd(src=src, src_dir=src_dir, build_dir=build_dir, compiler=compiler, defines=defines, std=std, includes=includes)

to

        src, obj, cmd = calc_object_cmd(src=src, src_dir=src_dir, build_dir=build_dir,
                                        compiler=compiler, defines=defines, std=std, includes=includes)

but not any further. That's a 103-long.

I can of course configure flake8 to accept that, but the shortening seems kind of arbitrary. Why not even shorter, if my configuration says so (i.e. 79-long in vanilla-mode)? Or am I missing something?

Related to #598, I guess.

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Environment

• autopep8 version: 1.6.0
• Platform: Linux