2.1.46 [W3C-HTML51] Section 4.10.5.1.4 URL state (type=url)

V0151: Value sanitization does not strip leading and trailing whitespace from a URL

The specification states:

 4.10.5.1.4 URL state (type=url)
     ...
     The value sanitization algorithm is as follows: Strip line breaks from the value, 
     then strip leading and trailing whitespace from the value.

EdgeHTML Mode

Value sanitization does not strip leading and trailing whitespace from a URL.