Merge pull request #2282 from uzluisf/master

Add missing letter

doc/Language/classtut.pod6

@@ -123,7 +123,7 @@ say Str-with-ID.new(string => 'Second').ID; # OUTPUT: «1»
 In this case, we need to compute C<$.ID> from the value of a counter that is a
 class variable, C<$.counter>, thus we simply assign a value to it and increment
 the counter at the same time. Please check also
-L<this section on C<TWEAK> in the Object Orientaion (OO) document|/language/objects#index-entry-TWEAK>
+L<this section on C<TWEAK> in the Object Orientation (OO) document|/language/objects#index-entry-TWEAK>
 for the mechanics of object construction.
 
 =head1 Starting with class