File paths can't have spaces

[imolloy]

Describe the bug
A parsing error is thrown when a file path has a space in it

Details of the bug
GET process FROM file:///a/path/with/a space/in_the_name/bundle.json

Results in:

lark.exceptions.UnexpectedCharacters: No terminal matches 's' in the current parser context, .....
/a/path/with/a space/in_the_name/bundle.json`
                        ^
Expected on of:
                * WHERE

To Reproduce
Try to run GET on a file:// bundle with a space in the name

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Environment (please complete the following information):

• OS: macOS 11.6
• Python version: 3.7.7
• Python install environment:
• STIX-Shifter version: latest github develop branch.

Additional context
Add any other context about the problem here.

[subbyte]

Good catch! We don't have space in the syntax currently.

Since the command has more components after FROM, and we need to avoid confusion in case of /a/path/with/a where space/in_the_name/bundle.json. Some potential solutions:

1. require escaping the space: /a/path/with/a\ where\ space/in_the_name/bundle.json
2. use quotes: "/a/path/with/a where space/in_the_name/bundle.json"

[subbyte]

confirmed fixed in v1.4.2 with test tests/test_parser.py::test_quoted_datasource