removed a character in a markdown cell that tests complained about in…

… making docs

examples/demo_coordinate_system_datasets.ipynb

@@ -38,7 +38,7 @@
     "mkdir -p $data_coords_dir\n",
     "cd $data_coords_dir\n",
     "```\n",
-    "Download all files from [dropbox link](https://www.dropbox.com/scl/fo/dwsccslr5iwb7lnkf8jvx/AJkjgFeemUEHpHaZaHHqpAg?rlkey=efbtsr15mdrs3y6xsm7l48o0r&st=xb58ap0g&dl=0).  This will be a zip file, `CLMM_data.zip` of size 242 Mb. scp or move this to `$data_coords_dir`.\n",
+    "Download all files from [dropbox link](https://www.dropbox.com/scl/fo/dwsccslr5iwb7lnkf8jvx/AJkjgFeemUEHpHaZaHHqpAg?rlkey=efbtsr15mdrs3y6xsm7l48o0r&st=xb58ap0g&dl=0).  This will be a zip file, `CLMM_data.zip` of size 242 Mb. scp or move this to `data_coords_dir`.\n",
     "\n",
     "From the directory, you should be able to unzip:\n",
     "```\n",
@@ -689,7 +689,7 @@
      "data": {
       "text/html": [
        "<b>GalaxyCluster:</b> redmapper (ra=213.60024185108855, dec=-0.3776437738556696) at z=0.13786591589450836<br>> <b>with columns:</b> ra, dec, e1, e2, z, w_ls, sigma_c, theta, DS_t, DS_x<br>> 942595 source galaxies<br>\n",
-       "<table id=\"table139955849767760\" class=\"table-striped table-bordered table-condensed\">\n",
+       "<table id=\"table139682321509584\" class=\"table-striped table-bordered table-condensed\">\n",
        "<thead><tr><th>ra</th><th>dec</th><th>e1</th><th>e2</th><th>z</th><th>w_ls</th><th>sigma_c</th><th>theta</th><th>DS_t</th><th>DS_x</th></tr></thead>\n",
        "<thead><tr><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th></tr></thead>\n",
        "<tr><td>210.8215354813783</td><td>-1.50709995286189</td><td>0.080922931432724</td><td>0.10835766792297363</td><td>1.3758054971694946</td><td>3.9040415282504566</td><td>3819717759154588.0</td><td>0.052343996166526664</td><td>-510269837472835.9</td><td>-80491401304217.47</td></tr>\n",