TST: do run full flake8 checks, use only specific ignores

setup.cfg

@@ -20,6 +20,9 @@ filterwarnings =
 max-line-length = 110
 max-doc-length = 110
 exclude = __init__.py, conf.py, setup.py, version.py, conftest.py
+# W503 line break before operator
+ignore = W503
+
 
 [pycodestyle]
 max-line-length = 110

tox.ini

@@ -70,34 +70,8 @@ commands =
     sphinx-build -W -b html . _build/html
 
 [testenv:codestyle]
-# We list the warnings/errors to check for here rather than in setup.cfg because
-# we don't want these options to apply whenever anyone calls flake8 from the
-# command-line or their code editor - in this case all warnings/errors should be
-# checked for. The warnings/errors we check for here are:
-# E101 - mix of tabs and spaces
-# W191 - use of tabs
-# W291 - trailing whitespace
-# W292 - no newline at end of file
-# W293 - trailing whitespace
-# W391 - blank line at end of file
-# E111 - 4 spaces per indentation level
-# E112 - 4 spaces per indentation level
-# E113 - 4 spaces per indentation level
-# E301 - expected 1 blank line, found 0
-# E302 - expected 2 blank lines, found 0
-# E303 - too many blank lines (3)
-# E304 - blank lines found after function decorator
-# E305 - expected 2 blank lines after class or function definition
-# E306 - expected 1 blank line before a nested definition
-# E502 - the backslash is redundant between brackets
-# E722 - do not use bare except
-# E901 - SyntaxError or IndentationError
-# E902 - IOError
-# E999: SyntaxError -- failed to compile a file into an Abstract Syntax Tree
-# F822: undefined name in __all__
-# F823: local variable name referenced before assignment
 skip_install = true
-description = check code style, e.g. with flake8
+description = check code style
 deps = flake8
 changedir = {toxinidir}
-commands = flake8 pyvo --count --select=E101,W191,W291,W292,W293,W391,E111,E112,E113,E30,E502,E722,E901,E902,E999,F822,F823
+commands = flake8 pyvo --count