flake8: fix warnings E111, E123, E126, E128, E201, E202, E203, E225, E226, E231, E241, E251, E261, E265, E266, E305, E305, E402, E501, E502, E703, E722

[ligurio]

Bug description:

• E111: indentation is not a multiple of four
• E123: closing bracket does not match indentation of opening bracket's line
• E126: continuation line over-indented for hanging indent
• E128: continuation line under-indented for visual indent
• E201: whitespace after '('
• E202: whitespace before ')'
• E203: whitespace before ':'
• E225: missing whitespace around operator
• E226: missing whitespace around arithmetic operator
• E231: missing whitespace after ',', ';' or ':'
• E241: multiple spaces after ','
• E251: unexpected spaces around keyword / parameter equals
• E261: at least two spaces before inline comment
• E265: block comment should start with '#'
• E266: too many leading '#' for block comment
• E302: expected 2 blank lines, found 0
• E305: expected 2 blank lines after end of function or class
• E402: module level import not at top of file
• E501: line too long (82 > 79 characters)
• E502: the backslash is redundant between brackets
• E703: statement ends with a semicolon
• E722: do not use bare except, specify exception instead