Capitalize Python

README.md

@@ -137,8 +137,8 @@ The NIFTy package is licensed under the terms of the
 Contributing
 ------------
 
-Please note our convention not to use pure python `assert` statements in
-production code. They are not guaranteed to by executed by python and can be
+Please note our convention not to use pure Python `assert` statements in
+production code. They are not guaranteed to by executed by Python and can be
 turned off by the user (`python -O` in cPython). As an alternative use
 `ift.myassert`.