--- loncom/xml/lonplot.pm	2016/01/22 22:30:07	1.176
+++ loncom/xml/lonplot.pm	2018/09/26 14:52:43	1.179
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Dynamic plot
 #
-# $Id: lonplot.pm,v 1.176 2016/01/22 22:30:07 damieng Exp $
+# $Id: lonplot.pm,v 1.179 2018/09/26 14:52:43 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -525,7 +525,7 @@ my %axis_defaults =
         },
      xformat      => {
          default     => 'on',
-         test        => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
+         test        => sub {$_[0]=~/^(on|off|\d+(f|F|e|E|P(|\s*\Q\0317\0200\E)))$/},
          description => 'X-axis number formatting',
          edit_type   => 'choice',
          choices     => ['on', 'off', '2e', '2f'],
@@ -750,7 +750,7 @@ sub end_gnuplot {
                     "</div>\n";
 
             } else {
-              $result .= "<img $srcatt $widthatt $heightatt $alignatt $altatt>";
+                $result .= "<img $srcatt $widthatt $heightatt $alignatt $altatt>";
             }
         } elsif ($target eq 'tex') {
 	    &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");