Fix whitespaces in Python code for compliance with PEP-8

[sebastian]

Background

See #3949.

Based on our experiments we decided to ignore E309 and E501 and E125 when doing the automatic reformatting. The reasoning is:

• E309 -- adding an empty line before the first method in a class (except for the cases when the class has a docstring, that's E301). The empty line seems redundant, especially in the cases when the class has only one method. The absence of the empty line is not reported by pep8, so there's no reason to insert it.
• E501 -- breaking up long lines. At the moment autopep8 can't fix all long lines. Also, some of the fixes that it does actually make the code less readable and necessitate editing it by hand afterwards. To eliminate the prohibitive amount of manual work we choose to not fix the long lines for now.
• E125 -- indentation of broken up lines. Fixing this leads to re-indentation of some code, which was originally PEP8-compliant, in a way that reduces readability.

What to change

Run autopep8 --ignore E309,E501,E125 on all Python code. Use pydiff to double check that the bytecode isn't changing.

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/jshydra/rev/311f73842602

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/buildtools/rev/3816c08c0f98

[abpbot]

Some commits referencing this issue have landed:

• ​https://hg.adblockplus.org/sitescripts/rev/a10576491ec7
• ​https://hg.adblockplus.org/sitescripts/rev/d0a037315ba0

[abpbot]

Some commits referencing this issue have landed:

• ​https://hg.adblockplus.org/adblockpluschrome/rev/e3b6116b3f06
• ​https://hg.adblockplus.org/adblockpluschrome/rev/7ed44a87101e

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/cms/rev/407299178497

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/abpbot/rev/5216edd0e5dc

[abpbot]

Some commit referencing this issue has landed:
​https://hg.adblockplus.org/adblockplus/rev/4e9995b5d4e4

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/adblockplus/rev/a96e8e6c4028

[abpbot]

Some commits referencing this issue have landed:

• ​https://hg.adblockplus.org/adblockpluscore/rev/481f85604346
• ​https://hg.adblockplus.org/adblockpluscore/rev/7a0f171e1ef9

[abpbot]

Some commits referencing this issue have landed:

• ​https://hg.adblockplus.org/adblockplusui/rev/1c88a47ebb0c
• ​https://hg.adblockplus.org/adblockplusui/rev/190ce47bec82

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/codingtools/rev/7a39b2713077

[abpbot]

Some commits referencing this issue have landed:

• ​https://hg.adblockplus.org/infrastructure/rev/32c93bd5c654
• ​https://hg.adblockplus.org/infrastructure/rev/c1c72e1850a3

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/web.eyeo.com/rev/aea60d949a19

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/web.adblockplus.org/rev/89a0fbadef0f

[abpbot]

Some commits referencing this issue have landed:

• ​https://hg.adblockplus.org/screenshotter/rev/0f436fed4965
• ​https://hg.adblockplus.org/screenshotter/rev/e0f5bd66b668

[abpbot]

Some commits referencing this issue have landed:

• ​https://hg.adblockplus.org/adblockplustests/rev/6c8cd098cd2c
• ​https://hg.adblockplus.org/adblockplustests/rev/20191cfc3613

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/abpcrawler/rev/0dca4afa16f0

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/adblockplussafariios/rev/34f441dbfe1a

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/libadblockplus/rev/1391ac4281c8

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/adblockplusie/rev/09e80844bb0a

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/adblockbrowser-build/rev/b9666e20ad20

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/adblockbrowser/rev/084f575243cf

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/elemhidehelper/rev/beb74833e35d

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/abpwatcher/rev/116dd4a5b259

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/abpcustomization/rev/90f3b1b16cf0

[abpbot]

A commit referencing this issue has landed:
​https://hg.adblockplus.org/urlfixer/rev/90213fe3615c