-During the first iteration, index_var is set to the value of start.
-During each successive iteration, index_var is increased by the value of
-incr. If end > start, then the loop terminates when index_var > end;
-otherwise it terminates when index_var < end. If incr is not specified
+During the first iteration, @var{index_var} is set to the value of @var{start}.
+During each successive iteration, @var{index_var} is increased by the value of
+@var{incr}. If @var{end} > @var{start}, then the loop terminates
+when @var{index_var} > @var{end};
+otherwise it terminates when @var{index_var} < @var{end}. If @var{incr} is not specified