Space VC context test title.

tests/10-vcdm2.js

@@ -161,7 +161,7 @@ describe('Verifiable Credentials Data Model v2.0', function() {
             require('./input/presentation-no-context-fail.json')));
         });
       it2('Verifiable credentials: The value of the @context property MUST' +
-        'be an ordered set where the first item is a URL with the value' +
+        ' be an ordered set where the first item is a URL with the value ' +
         'https://www.w3.org/ns/credentials/v2.', async function() {
         //positive issue test
         const vc = await issue(require('./input/credential-ok.json'));