improved testing

exercises/errors-and-testing/errors-and-testing-solution.ipynb

@@ -1999,7 +1999,7 @@
     "\n",
     "You can run and debug tests in  Visual Studio Code, which is very handy. First, you need to set it up.\n",
     "\n",
-    "1. Hit `Control-Shift-P` and type `Python: Configure Tests`  \n",
+    "1. Hit `Control-Shift-P` (on Mac: `Command-Shift-P`) and type `Python: Configure Tests`  \n",
     "\n",
     "![](img/vscode-1.png)\n",
     "\n",
@@ -2035,18 +2035,18 @@
    "source": [
     "<div class=\"alert alert-warning\">\n",
     "\n",
-    "**Troubleshooting:**\n",
+    "**TROUBLESHOOTING**\n",
     "\n",
     "</div>\n",
     "\n",
     "If you encounter problems running tests and have Anaconda, sometimes an easy solution can be just closing Visual Studio Code and running it from the Anaconda Navigator. You can also try to update it.\n",
     "\n",
     "\n",
-    "Running test by console does not work: \n",
+    "**Running tests by console does not work:**\n",
     "\n",
     "* remember to SAVE the files before executing tests: in Windows, a file appears as not saved when its filename in the tab is written in italics; on Linux, you might see a dot to the right of the filename\n",
     "\n",
-    "`Run Test` label does not show up in code: \n",
+    "**Run Test label does not show up in code:**\n",
     "\n",
     "- if you see red squiggles in the code, most probably syntax is not correct and thus no test will get discovered ! If this is the case, fix the syntax error, SAVE, and then tell Visual Studio to discover test. \n",
     "- you might also try  _Right click->Run current Test File_. \n",