Add testing of earth.pdf

Author: linev

demo/examples_more.json

@@ -33,7 +33,7 @@
      { "name": "docu_surf", "file": "histpainter6.root", "layout": "grid4x2", "items": ["draw_surf", "draw_surf1", "draw_surf2", "draw_surf3", "draw_surf4", "draw_surf5", "draw_surf7", "draw_surf2_cont1"], "title": "several TH2 SURF examples from THistPainter documentation page" },
      { "name": "lego_tf2", "file": "https://root.cern/files/StressIOPluginsTestFiles/stress_5.root", "item":"h2form", "opt":"allfunc,lego", "title": "Combination of th2 an tf2 in 3D" },
      { "name": "tut1", "file": "tutorials_hist.root", "layout": "grid2x2", "items": ["thstack2palettecolor", "reverseaxis", "hlabels2", "labels3"], "opts": ["0lego1_pfc"], "title": "Macro outputs from $ROOTSYS/tutorials/hist" },
-     { "name": "earth", "file": "tutorials_graphics.root", "item": "earth",  "title": "Earth projections, tutorials/graphics/earth.C" },
+     { "name": "earth", "file": "tutorials_graphics.root", "item": "earth",  "title": "Earth projections, tutorials/graphics/earth.C", "pdf": true },
      { "name": "hard_cont", "file": "hard_contour.root", "item": "hard_contour",  "title": "Complex contour plot without closed lines, trying to fix it", "opt":"cont" },
      { "name": "symlog", "opt": "col,symlogx,symlogy", "file": "hsimple.root", "item": "hpxpy;1", "title": "symlog scale with default 1e-3 factor for constant" },
      { "name": "symlog1", "opt": "col,symlogx1,symlogy1", "file": "hsimple.root", "item": "hpxpy;1", "title": "symlog scale with 1e-1 factor for constant" },