Fix some grammar

Closes gh-8

Author: takluyver

_sections/40-timeline.md

@@ -7,14 +7,12 @@ style: center
 
 #   Projects Timeline
 
-In the following chart, you can see many project that have decided to stop
-supporting Python 2 before 2020. The graph below is a guideline that show what
-version of each project support Python 2, or not, release timeline, and
-extended support (Python's own timeline is available
+In the following chart, you can see many projects that have decided to stop
+supporting Python 2 before 2020. The chart is a guideline to show what
+versions of each project support Python 2, or not, their release timelines, and
+extended support. (Python's own timeline is available
 [here](https://docs.python.org/devguide/#status-of-python-branches)).
 
 <div id="visualization"></div>
 
 See how to [add  your project to the list of participating project](https://github.com/python3statement/python3statement.github.io#add-your-project) and to [this timeline](https://github.com/python3statement/python3statement.github.io#add-timeline-informations)
-
-