--- a/scripts/miscellaneous/what.m
+++ b/scripts/miscellaneous/what.m
@@ -17,12 +17,12 @@
 ## <http://www.gnu.org/licenses/>.
 
 ## -*- texinfo -*-
-## @deftypefn  {Command} {} what 
+## @deftypefn  {Command} {} what
 ## @deftypefnx {Command} {} what @var{dir}
 ## @deftypefnx {Function File} {w =} what (@var{dir})
 ## List the Octave specific files in a directory.  If the variable @var{dir}
 ## is given then check that directory rather than the current directory.  If
-## a return argument is requested, the files found are returned in the 
+## a return argument is requested, the files found are returned in the
 ## structure @var{w}.
 ## @seealso{which}
 ## @end deftypefn
@@ -63,13 +63,13 @@
       ## Ignore mdl and p files
       [dummy, f, e] = fileparts (n);
       if (strcmp (e, ".m"))
-        w.m{end+1} = n; 
+        w.m{end+1} = n;
       elseif (strcmp (e, mexext ()))
-        w.mex{end+1} = n; 
+        w.mex{end+1} = n;
       elseif (strcmp (e, ".oct"))
         w.oct{end+1} = n;
       elseif (strcmp (e, ".mat"))
-        w.mat{end+1} = n; 
+        w.mat{end+1} = n;
       elseif(strcmp (n(1), "@"))
         w.classes{end+1} = n;
       endif
@@ -90,7 +90,7 @@
 function __display_filenames__ (msg, p, f)
   if (length (f) > 0)
     printf ("%s %s:\n\n", msg, p)
-  
+
     maxlen = max (cellfun (@length, f));
     ncols = max (1, floor (terminal_size()(2) / (maxlen + 3)));
     fmt = "";
@@ -99,7 +99,7 @@
     endfor
     fmt = [fmt, "\n"];
 
-    nrows = ceil (length (f) / ncols); 
+    nrows = ceil (length (f) / ncols);
     for i = 1 : nrows
       args  = f(i:nrows:end);
       if (length (args) < ncols)