replaced tabs with spaces in a docstring that resulted in problems wi…

…th the newest black version. Fixes #128

fixes flake8 errors for all files

.flake8

@@ -1,5 +1,5 @@
 [flake8]
-ignore = E, W, C901
+ignore = E, W, C901, radis/io/hapi.py, */__init__.py
 max-line-length = 89
 max-complexity = 18
 select = B,C,E,F,W,T4,B9

docs/conf.py

@@ -21,7 +21,6 @@
 from __future__ import absolute_import
 import sys
 import os
-import shlex
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the

radis/__init__.py

@@ -149,20 +149,20 @@
 
 
 def get_version(verbose=False, add_git_number=True):
-    """ Reads `__version.txt__ <https://github.com/radis/radis/blob/master/radis/__version__.txt>`__ 
-    and retrieve version number. 
-    If ``add_git_number``, also appends Git commit number if we're on a gitted session 
-    
+    """Reads `__version.txt__ <https://github.com/radis/radis/blob/master/radis/__version__.txt>`__
+    and retrieve version number.
+    If ``add_git_number``, also appends Git commit number if we're on a gitted session
+
     Examples
     --------
-    
+
     ::
-        
+
         import radis
         print(radis.get_version())
         >>> '0.9.17'
-        
-        """
+
+    """
 
     # First get version
     with open(os.path.join(getProjectRoot(), "__version__.txt")) as version_file: