--- a/scripts/plot/contourf.m	Sun Sep 22 18:33:57 2013 -0700
+++ b/scripts/plot/contourf.m	Mon Sep 23 08:55:19 2013 -0700
@@ -72,7 +72,7 @@
     hax = newplot (hax);
     
     [ctmp, htmp] = __contour__ (hax, "none", "fill", "on",
-                                "linecolor", "black", varargin{:});
+                                     "linecolor", "black", varargin{:});
   unwind_protect_cleanup
     if (! isempty (oldfig))
       set (0, "currentfigure", oldfig);

--- a/scripts/plot/feather.m	Sun Sep 22 18:33:57 2013 -0700
+++ b/scripts/plot/feather.m	Mon Sep 23 08:55:19 2013 -0700
@@ -71,7 +71,7 @@
   have_line_spec = false;
   while (ioff <= nargin)
     arg = varargin{ioff++};
-    if ((ischar (arg) || iscell (arg)) && ! have_line_spec)
+    if ((ischar (arg) || iscellstr (arg)) && ! have_line_spec)
       [linespec, valid] = __pltopt__ ("feather", arg, false);
       if (valid)
         line_spec = arg;

--- a/scripts/plot/plotmatrix.m	Sun Sep 22 18:33:57 2013 -0700
+++ b/scripts/plot/plotmatrix.m	Mon Sep 23 08:55:19 2013 -0700
@@ -129,7 +129,7 @@
   parent = get (bigax, "parent");
   for i = 1 : nargin - 1
     arg = varargin{i};
-    if (ischar (arg) || iscell (arg))
+    if (ischar (arg) || iscellstr (arg))
       [linespec, valid] = __pltopt__ ("plotmatrix", varargin{i}, false);
       if (valid)
         have_line_spec = true;

--- a/scripts/plot/private/__bar__.m	Sun Sep 22 18:33:57 2013 -0700
+++ b/scripts/plot/private/__bar__.m	Mon Sep 23 08:55:19 2013 -0700
@@ -73,7 +73,7 @@
       group = false;
       idx++;
     else
-      if ((ischar (varargin{idx}) || iscell (varargin{idx}))
+      if ((ischar (varargin{idx}) || iscellstr (varargin{idx}))
           && ! have_line_spec)
         [linespec, valid] = __pltopt__ (func, varargin{idx}, false);
         if (valid)

--- a/scripts/plot/private/__pltopt__.m	Sun Sep 22 18:33:57 2013 -0700
+++ b/scripts/plot/private/__pltopt__.m	Mon Sep 23 08:55:19 2013 -0700
@@ -89,24 +89,19 @@
 
 ## Author: jwe
 
-function [options, valid] = __pltopt__ (caller, opt, err_on_invalid)
-
-  valid = true;
-  options =  __default_plot_options__ ();
+function [options, valid] = __pltopt__ (caller, opt, err_on_invalid = true)
 
-  if (nargin == 2)
-    err_on_invalid = true;
-  endif
+  options = __default_plot_options__ ();
+  valid = true;
+
   if (ischar (opt))
-    nel = rows (opt);
-  elseif (iscellstr (opt))
-    nel = numel (opt);
-  else
+    opt = cellstr (opt);
+  elseif (! iscellstr (opt))
     error ("__pltopt__: argument must be a character string or cell array of character strings");
   endif
-  if (ischar (opt))
-    opt = cellstr (opt);
-  endif
+
+  nel = numel (opt);
+
   for i = nel:-1:1
     [options(i), valid] = __pltopt1__ (caller, opt{i}, err_on_invalid);
     if (! err_on_invalid && ! valid)
@@ -127,17 +122,11 @@
   options = __default_plot_options__ ();
   valid = true;
 
-  more_opts = 1;
-
-  if (! ischar (opt))
-    return;
-  endif
-
   have_linestyle = false;
   have_marker = false;
 
   ## If called by __errplot__, extract the linestyle before proceeding.
-  if (strcmp (caller,"__errplot__"))
+  if (strcmp (caller, "__errplot__"))
     if (strncmp (opt, "#~>", 3))
       n = 3;
     elseif (strncmp (opt, "#~", 2) || strncmp (opt, "~>", 2))

--- a/scripts/plot/private/__quiver__.m	Sun Sep 22 18:33:57 2013 -0700
+++ b/scripts/plot/private/__quiver__.m	Mon Sep 23 08:55:19 2013 -0700
@@ -83,7 +83,7 @@
     arg = varargin{ioff++};
     if (ischar (arg) && strcmpi (arg, "filled"))
       have_filled = true;
-    elseif ((ischar (arg) || iscell (arg))
+    elseif ((ischar (arg) || iscellstr (arg))
             && ! have_line_spec)
       [linespec, valid] = __pltopt__ ("quiver", arg, false);
       if (valid)

--- a/scripts/plot/private/__scatter__.m	Sun Sep 22 18:33:57 2013 -0700
+++ b/scripts/plot/private/__scatter__.m	Mon Sep 23 08:55:19 2013 -0700
@@ -93,7 +93,7 @@
     arg = varargin{iarg++};
     if (ischar (arg) && (strcmpi (arg, "filled") || strcmpi (arg, "fill")))
       filled = true;
-    elseif ((ischar (arg) || iscell (arg)) && ! have_marker)
+    elseif ((ischar (arg) || iscellstr (arg)) && ! have_marker)
       [linespec, valid] = __pltopt__ (fcn, arg, false);
       if (valid)
         have_marker = true;

--- a/scripts/plot/private/__stem__.m	Sun Sep 22 18:33:57 2013 -0700
+++ b/scripts/plot/private/__stem__.m	Mon Sep 23 08:55:19 2013 -0700
@@ -274,7 +274,7 @@
     arg = varargin{ioff++};
     if (ischar (arg) && any (strcmpi (arg, {"fill", "filled"})))
       dofill = true;
-    elseif ((ischar (arg) || iscell (arg)) && ! have_line_spec)
+    elseif ((ischar (arg) || iscellstr (arg)) && ! have_line_spec)
       [linespec, valid] = __pltopt__ (caller, arg, false);
       if (valid)
         have_line_spec = true;

--- a/scripts/plot/stairs.m	Sun Sep 22 18:33:57 2013 -0700
+++ b/scripts/plot/stairs.m	Mon Sep 23 08:55:19 2013 -0700
@@ -149,7 +149,7 @@
   have_line_spec = false;
   for i = 1:2:numel (varargin)
     arg = varargin{i};
-    if (ischar (arg) || iscell (arg))
+    if (ischar (arg) || iscellstr (arg))
       [linespec, valid] = __pltopt__ ("stairs", arg, false);
       if (valid)
         have_line_spec = true;