Merge pull request go101#283 from MambaWong/master

change 'variables' to 'constants' in 'Constant Declarations'

pages/fundamentals/constants-and-variables.html

@@ -301,7 +301,7 @@ <h3>Constant Declarations</h3>
 Please note that, constants can be declared both
 at package level (out of any function body) and in function bodies.
 The constants declared in function bodies are called local constants.
-The variables declared out of any function body
+The constants declared out of any function body
 are called package-level constants.
 We also often call package-level constants as global constants.
 </p>