Fix some travis warnings and errors

Author: Jürgen Hasch

src/jupyter_contrib_nbextensions/nbextensions/code_prettify/README_isort.md

@@ -35,6 +35,6 @@ All options are provided by the [KerneExecOnCells library](kernel_exec_on_cell.j
 
 Under the hood, this nbextension uses the [kerneexeconcells library](kernel_exec_on_cell.js), a shared library for creating Jupyter nbextensions which transform code cell text using calls to the active kernel.
 
-See the [shared README](REAME.md) and [kerneexeconcells library](kernel_exec_on_cell.js) for the internal model used by the nbextension.
+See the [shared README](README.md) and [kerneexeconcells library](kernel_exec_on_cell.js) for the internal model used by the nbextension.
 
 [fontawesome]: https://fontawesome.com/icons

src/jupyter_contrib_nbextensions/nbextensions/hide_input/readme.md

@@ -18,7 +18,7 @@ Exporting with nbconvert
 ------------------------
 
 See also the general docs for exporting using nbconvert at
-[jupyter-contrib-nbextensions.readthedocs.io](https://jupyter-contrib-nbextensions.readthedocs.io/en/latest).
+[jupyter-contrib-nbextensions.readthedocs.io](https://jupyter-contrib-nbextensions.readthedocs.io/en/latest/).
 
 To export a notebook with hidden cell inputs using nbconvert, you need to use a
 custom template.

src/jupyter_contrib_nbextensions/nbextensions/varInspector/var_list.py

@@ -10,7 +10,8 @@
 try:
     import numpy as np
 except ImportError:
-    pass    
+    pass
+
 
 def _getsizeof(x):
     # return the size of variable x. Amended version of sys.getsizeof
@@ -22,14 +23,16 @@ def _getsizeof(x):
     else:
         return getsizeof(x)
 
+
 def _getshapeof(x):
-    #returns the shape of x if it has one
-    #returns None otherwise - might want to return an empty string for an empty collum
+    # returns the shape of x if it has one
+    # returns None otherwise - might want to return an empty string for an empty collum
     try:
         return x.shape
-    except AttributeError: #x does not have a shape
+    except AttributeError:  # x does not have a shape
         return None
 
+
 def var_dic_list():
     types_to_exclude = ['module', 'function', 'builtin_function_or_method',
                         'instance', '_Feature', 'type', 'ufunc']

tests/test_preprocessors.py

@@ -218,4 +218,3 @@ def test_preprocessor_execute_time():
                 _normalize_iso8601_timezone(etmd['end_time']),
                 _normalize_iso8601_timezone(etmd['start_time']),
                 'end_time should not be before start_time')
-