SAFE_POINT when a parameter of type "String" contains a space in the "Default value" field

Scenario:

1. Open the WD and click "Create element with external tool" on the toolbar.
2. Click on the "Integrated external tool" radio button and click "Next" twice
   Expected state: the "Parameters" page is opened.
3. Add a parameter, set "Display name" to "par", set "Default value" to "default value".
4. Click "Next" twice.
5. Set the following command:

   %USUPP_JAVA% -version
   

6. Finalize the wizard and run the workflow.
   Expected result: the workflow is run correctly.
   Current result: a SAFE_POINT is triggered.

The problem happens because string "default value" contains a space character. It isn't wrapped with double quotes in the ".etc" file. The obvious solution is to wrap this value with double quotes.