Typo

Doc/ext/building.tex

@@ -8,7 +8,7 @@ file for building make files for building dynamically-linked
 extensions and custom interpreters.  Starting with Python 2.0, this
 mechanism (known as related to Makefile.pre.in, and Setup files) is no
 longer supported. Building custom interpreters was rarely used, and
-extensions modules can be built using distutils.
+extension modules can be built using distutils.
 
 Building an extension module using distutils requires that distutils
 is installed on the build machine, which is included in Python 2.x and

Doc/ext/windows.tex

@@ -110,7 +110,7 @@ Hello, world
     extension module.
 
   \item
-  \strong{Cretating your own project}\\
+  \strong{Creating your own project}\\
     Choose a name and create a directory for it.  Copy your C sources
     into it.  Note that the module source file name does not
     necessarily have to match the module name, but the name of the