Merge pull request #3453 from edx/sylvia/docs/DOC-224

Typo corrections

docs/en_us/course_authors/source/creating_content/create_problem.rst

@@ -26,9 +26,8 @@ For more information, see the following topics.
 * :ref:`Problem Settings`
 * :ref:`Modifying a Released Problem`
 * :ref:`Additional Work with Problems`
-
-  * :ref:`Multiple Problems in One Component`
-  * :ref:`Problem Randomization`
+* :ref:`Multiple Problems in One Component`
+* :ref:`Problem Randomization`
   
 
 .. _Problem Student View:
@@ -134,8 +133,10 @@ You can switch at any time from the Simple Editor to the Advanced Editor by clic
 
 .. _Simple Editor:
 
+=================
 The Simple Editor
 =================
+
 Several problem templates, including multiple choice and text input problem templates, open in the Simple Editor. The following image shows a multiple choice problem in the Simple Editor.
 
 .. image:: ../Images//MultipleChoice_SimpleEditor.png

docs/en_us/course_authors/source/exercises_tools/custom_python.rst

@@ -4,7 +4,7 @@
 Write-Your-Own-Grader Problem
 ##############################
 
-In custom Python-evaluated input (also called "write-your-own-grader problems" problems), the grader uses a Python script that you create and embed in the problem to evaluates a student's response or provide hints. These problems can be any type. Numerical input and text input problems are the most popular write-your-own-grader problems.
+In custom Python-evaluated input (also called "write-your-own-grader" problems), the grader uses a Python script that you create and embed in the problem to evaluates a student's response or provide hints. These problems can be any type. Numerical input and text input problems are the most popular write-your-own-grader problems.
 
 .. image:: /Images/CustomPythonExample.png
  :alt: Image of a write your own grader problem

docs/en_us/course_authors/source/exercises_tools/index.rst

@@ -14,7 +14,6 @@ Creating Exercises and Tools
    circuit_schematic_builder
    conditional_module
    custom_javascript
-   custom_python
    drag_and_drop
    dropdown
    external_graders
@@ -36,5 +35,6 @@ Creating Exercises and Tools
    protein_builder
    text_input
    word_cloud
+   custom_python
    zooming_image
    mathjax