Improve the grammar in windows.rst (GH-1330)
diff --git a/Doc/using/windows.rst b/Doc/using/windows.rst
index 3e4b70e..68687e9 100644
--- a/Doc/using/windows.rst
+++ b/Doc/using/windows.rst
@@ -550,9 +550,9 @@
If the first line of a script file starts with ``#!``, it is known as a
"shebang" line. Linux and other Unix like operating systems have native
-support for such lines and are commonly used on such systems to indicate how
-a script should be executed. This launcher allows the same facilities to be
-using with Python scripts on Windows and the examples above demonstrate their
+support for such lines and they are commonly used on such systems to indicate
+how a script should be executed. This launcher allows the same facilities to
+be used with Python scripts on Windows and the examples above demonstrate their
use.
To allow shebang lines in Python scripts to be portable between Unix and
