makegallerytests: keep figures hidden by default (Visible off)

Author: robertoffmoura

plotly/makegallerytests.m

@@ -17,10 +17,10 @@
     %                  Default: current working directory.
     %   Tests        - cellstr of test names to include.
     %                  Default: all tests in Test_plotlyfig.m.
-    %   Visible      - 'on' (default) to make the figures visible while
-    %                  the gallery is generated ('off' works on MATLAB
-    %                  but fltk cannot print hidden figures), 'off' to
-    %                  keep them hidden.
+    %   Visible      - 'off' (default) to keep the figures hidden while
+    %                  the gallery is generated. Pass 'on' if your
+    %                  graphics toolkit cannot print hidden figures
+    %                  (Octave's fltk), 'off' otherwise.
     %   EmbedPNG     - true (default) to embed the native PNGs in the
     %                  HTML as base64 data URIs (single self-contained
     %                  file), false to link to separate .png files.
@@ -117,7 +117,7 @@
         'FileName', 'plotly_gallery_tests.html', ...
         'OutputFolder', pwd, ...
         'Tests', {{}}, ...
-        'Visible', 'on', ...
+        'Visible', 'off', ...
         'EmbedPNG', true, ...
         'SavePNGs', false, ...
         'PlotlyJS', 'auto', ...