Remove space from kernel launching arguments for better compatibility…

… with VSCode

VSCode's Jupyter extension (by Microsoft) does not seem to quote arguments that it finds in kernel.json, which results in passing the python code as separate arguments.
Removed all the spaces from the script, to ensure that the entire python code is passed as one argument.

JupyterKernel/Resources/kernel-template.json.in

@@ -5,6 +5,6 @@
         "{slicer_launcher_executable}",
         "--no-splash",
         "--python-code",
-        "connection_file=r'{connection_file}'; print('Jupyter connection file: ['+connection_file+']'); slicer.modules.jupyterkernel.startKernel(connection_file);slicer.util.mainWindow().showMinimized()"
+        "connection_file=r'{connection_file}';print('JupyterConnectionFile:['+connection_file+']');slicer.modules.jupyterkernel.startKernel(connection_file);slicer.util.mainWindow().showMinimized()"
     ]
 }