Update static checks and make code better

* doc8 -> better docs
* pylint reconfigure and switch logging to python 3.6 f-strings
* drop not used logger instances
* use better global const naming
* drop py2 related config from pylint (master is py3.6+ only)
* better .editorconfig - default indent style is 2, 4 is for python only

Signed-off-by: Aleksei Stepanov <penguinolog@gmail.com>

Author: penguinolog

.coveragerc

@@ -1,16 +1,16 @@
 [run]
 source =
-    exec_helpers
+  exec_helpers
 omit =
-    test/*
+  test/*
 
 [report]
 exclude_lines =
-    # Have to re-enable the standard pragma
-    pragma: no cover
+  # Have to re-enable the standard pragma
+  pragma: no cover
 
-    # Don't complain about missing debug-only code:
-    def __repr__
+  # Don't complain about missing debug-only code:
+  def __repr__
 
-    # Don't complain if non-runnable code isn't run:
-    if __name__ == .__main__.:
+  # Don't complain if non-runnable code isn't run:
+  if __name__ == .__main__.:

.editorconfig

@@ -3,16 +3,17 @@ root = true
 [*]
 charset = utf-8
 end_of_line = lf
-indent_size = 4
+indent_size = 2
 indent_style = space
 insert_final_newline = true
 trim_trailing_whitespace = true
 
-[*.{py,ini}]
+[*.{py,pyx,pxd}]
+indent_size = 4
 max_line_length = 120
 
-[*.{yml,yaml,rst}]
-indent_size = 2
+[*.rst]
+max_line_length = 150
 
 [Makefile]
 indent_style = tab