#2194: fix some typos.

Doc/tutorial/interpreter.rst

@@ -22,7 +22,7 @@ guru or system administrator.  (E.g., :file:`/usr/local/python` is a popular
 alternative location.)
 
 On Windows machines, the Python installation is usually placed in
-:file:`C:\Python26`, though you can change this when you're running the
+:file:`C:\\Python26`, though you can change this when you're running the
 installer.  To add this directory to your path,  you can type the following
 command into the command prompt in a DOS box::
 

Doc/using/unix.rst

@@ -20,7 +20,7 @@ package on all others.  However there are certain features you might want to use
 that are not available on your distro's package.  You can easily compile the
 latest version of Python from source.
 	
-In the event Python doesn't come preinstalled and isn't in the repositories as
+In the event that Python doesn't come preinstalled and isn't in the repositories as
 well, you can easily make packages for your own distro.  Have a look at the
 following links:
 

Doc/using/windows.rst

@@ -21,7 +21,7 @@ has compiled Windows installers (MSI packages) with every `release
 <http://www.python.org/download/releases/>`_ for many years.
 
 With ongoing development of Python, some platforms that used to be supported
-earlier are not longer supported (due to the lack of users or developers).
+earlier are no longer supported (due to the lack of users or developers).
 Check :pep:`11` for details on all unsupported platforms.
 
 * DOS and Windows 3.x are deprecated since Python 2.0 and code specific to these