--- a/scripts/plot/specular.m
+++ b/scripts/plot/specular.m
@@ -17,13 +17,16 @@
 ## <http://www.gnu.org/licenses/>.
 
 ## -*- texinfo -*-
-## @deftypefn {Function File} {} specular (@var{sx}, @var{sy}, @var{sz}, @var{l}, @var{v})
+## @deftypefn  {Function File} {} specular (@var{sx}, @var{sy}, @var{sz}, @var{l}, @var{v})
 ## @deftypefnx {Function File} {} specular (@var{sx}, @var{sy}, @var{sz}, @var{l}, @var{v}, @var{se})
 ## Calculate specular reflection strength of a surface defined by the normal
 ## vector elements @var{sx}, @var{sy}, @var{sz} using Phong's approximation. 
-## The light and view vectors can be specified using parameter @var{L} and @var{V} respectively.
-## Both can be given as 2-element vectors [azimuth, elevation] in degrees or as 3-element
-## vector [x, y, z].  An optional 6th argument describes the specular exponent (spread) @var{se}.
+## The light and view vectors can be specified using parameter @var{L} and
+## @var{V} respectively.
+## Both can be given as 2-element vectors [azimuth, elevation] in degrees or as
+## 3-element
+## vector [x, y, z].  An optional 6th argument describes the specular exponent
+## (spread) @var{se}.
 ## @seealso{surfl, diffuse}
 ## @end deftypefn