Merge pull request #299 from cecilehannay/main

improve sourcemods exercise

Author: cecilehannay

notebooks/sourcemods/exercises/exercise_add_field.ipynb

@@ -102,9 +102,8 @@
     "    \n",
     "**First change**\n",
     "    \n",
-    "Under the lines: \n",
+    "Under the lines: (line 245)\n",
     "```\n",
-    "!++ add a variable for T500 \n",
     "call addfld ('T500', horiz_only,  'A', 'K','Temperature at 500 mbar pressure surface') \n",
     "```\n",
     "add the lines:\n",
@@ -117,7 +116,6 @@
     "**Second change**\n",
     "Under the lines: \n",
     "```\n",
-    "!++ add a variable for T500 \n",
     "if (hist_fld_active('T500')) then \n",
     "    call vertinterp(ncol, pcols, pver, state%pmid, 50000._r8, state%t, p_surf, & \n",
     "         extrapolate='T', ps=state%ps, phis=state%phis)\n",