fixed a grammatical issue

Author: Arthur Ozga

src/compiler/binder.ts

@@ -166,7 +166,7 @@ module ts {
         }
 
         /**
-         * Declares a Symbol for the Node and add it to symbols. Reports errors for conflicting identifier names.
+         * Declares a Symbol for the node and adds it to symbols. Reports errors for conflicting identifier names.
          * @param symbolTable - The symbol table which node will be added to.
          * @param parent - If node is in a class, parent denotes the parent declaration.
          * @param node - The declaration to be added to the symbol table
@@ -185,7 +185,7 @@ module ts {
                 // Check and see if the symbol table already has a symbol with this name.  If not,
                 // create a new symbol with this name and add it to the table.  Note that we don't
                 // give the new symbol any flags *yet*.  This ensures that it will not conflict 
-                // witht he 'excludes' flags we pass in.
+                // with the 'excludes' flags we pass in.
                 //
                 // If we do get an existing symbol, see if it conflicts with the new symbol we're
                 // creating.  For example, a 'var' symbol and a 'class' symbol will conflict within