fix(marshal): Consistently quote "@qclass" in error messages

Author: gibson042

packages/marshal/src/encodeToCapData.js

@@ -345,7 +345,7 @@ export const makeDecodeFromCapData = ({
       assert.typeof(
         qclass,
         'string',
-        X`invalid qclass typeof ${q(typeof qclass)}`,
+        X`invalid ${q(QCLASS)} typeof ${q(typeof qclass)}`,
       );
       switch (qclass) {
         // Encoding of primitives not handled by JSON

packages/marshal/test/test-marshal-capdata.js

@@ -290,7 +290,9 @@ test('passStyleOf null is "null"', t => {
 test('mal-formed @qclass', t => {
   const m = makeTestMarshal();
   const uns = body => m.unserialize({ body, slots: [] });
-  t.throws(() => uns('{"@qclass": 0}'), { message: /invalid qclass/ });
+  t.throws(() => uns('{"@qclass": 0}'), {
+    message: /invalid "@qclass" typeof "number"*/,
+  });
 });
 
 test('records', t => {

packages/marshal/test/test-marshal-stringify.js

@@ -52,7 +52,7 @@ test('marshal parse errors', t => {
     message: /Unexpected token X in JSON at position 0*/,
   });
   t.throws(() => parse('{"@qclass":8}'), {
-    message: /invalid qclass typeof "number"*/,
+    message: /invalid "@qclass" typeof "number"*/,
   });
   t.throws(() => parse('{"@qclass":"bogus"}'), {
     message: /unrecognized "@qclass" "bogus"*/,