Fix spaces in URL query string

[alex73]

Please fill this or delete as needed:

This pull request fixes #445

I remembered to:

• [x] Update or add unit tests if needed
• [x] Update or add documentation/comments if needed
• [x] Made sure stray files or whitespace didn't get committed
• [x] If significant changes, branch from develop and set to merge into develop
• [x] Read the guidelines for contributing

Changes: