Put URL at end of messages.

Author: davidlehn

lib/ContextResolver.js

@@ -171,21 +171,23 @@ module.exports = class ContextResolver {
       }
     } catch(e) {
       throw new JsonLdError(
-        `Dereferencing the URL "${url}" did not result in a valid JSON-LD ` +
-        'object. Possible causes are an inaccessible URL perhaps due to ' +
+        'Dereferencing a URL did not result in a valid JSON-LD object. ' +
+        'Possible causes are an inaccessible URL perhaps due to ' +
         'a same-origin policy (ensure the server uses CORS if you are ' +
         'using client-side JavaScript), too many redirects, a ' +
         'non-JSON response, or more than one HTTP Link Header was ' +
-        'provided for a remote context.',
+        'provided for a remote context. ' +
+        `URL: "${url}".`,
         'jsonld.InvalidUrl',
         {code: 'loading remote context failed', url, cause: e});
     }
 
     // ensure ctx is an object
     if(!_isObject(context)) {
       throw new JsonLdError(
-        `Dereferencing the URL "${url}" did not result in a JSON object. ` +
-        'The response was valid JSON, but it was not a JSON object.',
+        'Dereferencing a URL did not result in a JSON object. The ' +
+        'response was valid JSON, but it was not a JSON object. ' +
+        `URL: "${url}".`,
         'jsonld.InvalidUrl', {code: 'invalid remote context', url});
     }