Typo correction

"simply" not "simple"

applications/welcome/controllers/default.py

@@ -15,7 +15,7 @@ def index():
     example action using the internationalization operator T and flash
     rendered by views/default/index.html or views/generic.html
 
-    if you need a simple wiki simple replace the two lines below with:
+    if you need a simple wiki simply replace the two lines below with:
     return auth.wiki()
     """
     response.flash = T("Welcome to web2py!")