Fix trivial typo in Readme (GH-2185)

csabella · Mariatta · commit 4ebf03d109f8 · 2017-06-14T06:32:06.000-07:00
Replace platform with platforms.
diff --git a/Doc/using/index.rst b/Doc/using/index.rst
@@ -6,7 +6,7 @@
 
 
 This part of the documentation is devoted to general information on the setup
-of the Python environment on different platform, the invocation of the
+of the Python environment on different platforms, the invocation of the
 interpreter and things that make working with Python easier.
 
 
