Fixed argument name typo

Ary Borenszweig · Ary Borenszweig · commit 904b9fa8e223 · 2017-01-05T10:20:20.000-03:00
diff --git a/src/int.cr b/src/int.cr
@@ -340,7 +340,7 @@ struct Int
     TimesIterator(typeof(self)).new(self)
   end
 
-  def upto(n, &block : self ->) : Nil
+  def upto(to, &block : self ->) : Nil
     x = self
     while x <= to
       yield x
