[Bug #1618083] Add missing word; make a few grammar fixes
tree39aab0ade5659c5ce46985ffcccac40a3ea5ddb4
drwxr-xr-x - Demo
drwxr-xr-x - Doc
drwxr-xr-x - Grammar
drwxr-xr-x - Include
-rw-r--r-- 13548 LICENSE
drwxr-xr-x - Lib
drwxr-xr-x - Mac
-rw-r--r-- 35070 Makefile.pre.in
drwxr-xr-x - Misc
drwxr-xr-x - Modules
drwxr-xr-x - Objects
drwxr-xr-x - PC
drwxr-xr-x - PCbuild
drwxr-xr-x - PCbuild8
drwxr-xr-x - Parser
drwxr-xr-x - Python
-rw-r--r-- 55658 README
drwxr-xr-x - RISCOS
drwxr-xr-x - Tools
-rwxr-xr-x 637948 configure
-rw-r--r-- 96853 configure.in
-rwxr-xr-x 7122 install-sh
-rw-r--r-- 27049 pyconfig.h.in
-rw-r--r-- 67841 setup.py