bug in 2to3 dealing with "print FOO," followed by "sys.stdout.write('')"

[trentm]

BPO	8029
Nosy	@benjaminp, @merwok
Superseder	bpo-45544: Close 2to3 issues and list them here
Files	fix8029.patch: patch for fix_print and test_fixers to fix issue 8029

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2021-10-20.23:03:20.590>
created_at = <Date 2010-02-27.23:08:40.833>
labels = ['type-bug', 'expert-2to3']
title = 'bug in 2to3 dealing with "print FOO," followed by "sys.stdout.write(\'\')"'
updated_at = <Date 2021-10-20.23:03:20.590>
user = 'https://bugs.python.org/trentm'

bugs.python.org fields:

activity = <Date 2021-10-20.23:03:20.590>
actor = 'iritkatriel'
assignee = 'none'
closed = True
closed_date = <Date 2021-10-20.23:03:20.590>
closer = 'iritkatriel'
components = ['2to3 (2.x to 3.x conversion tool)']
creation = <Date 2010-02-27.23:08:40.833>
creator = 'trentm'
dependencies = []
files = ['16812']
hgrepos = []
issue_num = 8029
keywords = ['patch']
message_count = 3.0
messages = ['100194', '102590', '220666']
nosy_count = 4.0
nosy_names = ['benjamin.peterson', 'trentm', 'eric.araujo', 'gmattbond']
pr_nums = []
priority = 'normal'
resolution = 'wont fix'
stage = 'resolved'
status = 'closed'
superseder = '45544'
type = 'behavior'
url = 'https://bugs.python.org/issue8029'
versions = ['Python 2.7', 'Python 3.4', 'Python 3.5']

[trentm]

According to http://docs.python.org/reference/simple_stmts.html#the-print-statement the following with result in the print statement NOT printing a trailing space:

    import sys
    print u"ASD",; sys.stdout.write(u"")

However, 2to3 currently translates this to:

    import sys
    print("ASD", end=' '); sys.stdout.write("")

It *should* translate to:

    import sys
    print("ASD", end='')

You can also see the discussion of this on this lib3to2 bug report:
http://bitbucket.org/amentajo/lib3to2/issue/13/print-3-end-isnt-translated-properly
and translation of this between 2to3 and 3to2 here:
http://pythontranslationparty.appspot.com/6004/

[gmattbond]

I've attached a patch that fixes this particular idiom as well as a problem with the handling of bare 'print' statements. It also includes updated tests for these issues.

[BreamoreBoy]

@benjamin could you review the patch please.