Small code improvement.

README.md

@@ -353,7 +353,7 @@ Many other commands are available in Pry; to see the full list type
 with basic instructions for use; some commands have a more extensive
 help that can be accessed via typing `command_name --help`. A command
 will typically say in its description if the `--help` option is
-avaiable.
+available.
 
 ### Use Pry as your Rails Console
 

lib/pry/code/code_file.rb

@@ -17,7 +17,7 @@ class Pry
       %w(.c .h)      => :c,
       %w(.rhtml)     => :rhtml,
       %w(.yaml .yml) => :yaml,
-      %w(.cpp .hpp .cc .h cxx) => :cpp,
+      %w(.cpp .hpp .cc .h .cxx) => :cpp,
       %w(.rb .ru .irbrc .gemspec .pryrc .rake) => :ruby,
     }
 

lib/pry/pry_instance.rb

@@ -16,7 +16,7 @@
 # This will show a list of available commands and their usage. For more
 # information about Pry you can refer to the following resources:
 #
-# * http://pry.github.com/
+# * http://pryrepl.org/
 # * https://github.com/pry/pry
 # * the IRC channel, which is #pry on the Freenode network
 #