Minor formatting fix to Windows programming environment.

notebooks/programming_environment_windows.ipynb

@@ -154,23 +154,19 @@
     "Under 'Python commands', look for the 'Compile' line. Enter the following in the 'Command' box. Make sure you get the spaces right. You should have 'C:\\Python34\\python' followed by a space, and the rest of the command. If you have 'Python 34', with a space between *Python* and *34*, Geany will not be able to run your code. Also, make sure your capitalization matches what you see here exactly.\n",
     "\n",
     "    C:\\Python34\\python -m py_compile \"%f\"\n",
-    "\n",
     "Under 'Execute commands', look for the 'Execute' line. Enter the following in the 'Command' box, paying attention once again to the spaces.\n",
     "\n",
     "    C:\\Python34\\python \"%f\"\n",
-    "\n",
     "Test your setup by running *hello.py* again.\n",
     "\n",
     "### Python 2\n",
     "\n",
     "If you installed Python 2.7 instead of Python 3, the commands you want are probably:\n",
     "\n",
     "    C:\\Python27\\python -m py_compile \"%f\"\n",
-    "\n",
     "and\n",
     "\n",
     "    C:\\Python27\\python \"%f\"\n",
-    "\n",
     "### Troubleshooting\n",
     "\n",
     "If Geany still can't run your *hello.py* program, check to see if your installation of Python is somewhere else.\n",