Merge pull request #3669 from olorin37/patch-2

Correct typo

Author: coke

doc/Language/haskell-to-p6.pod6

@@ -540,7 +540,7 @@ TODO
 =head1 Tail Call Optimization or Tail Call Elimination
 
 Haskell and many other functional programming languages use tail call optimization, also
-sometimes called tail tall elimination, to remove the stack overhead of some types
+sometimes called tail call elimination, to remove the stack overhead of some types
 of recursive function calls.
 
 There is nothing in the Raku language specification forbidding the implementation of this