Use one declaration per statement

The old style of merging all of a function's variable declarations into
a single statement made some sense back in the days of var, but there's
no reason to keep doing it now that we use const and let.

spec/core/integration/CustomAsyncMatchersSpec.js

@@ -86,16 +86,16 @@ describe('Custom Async Matchers (Integration)', function() {
 
   it('passes the jasmine utility to the matcher factory', async function() {
     const matcherFactory = function() {
-        return {
-          compare: function() {
-            return Promise.resolve({ pass: true });
-          }
-        };
-      },
-      matcherFactorySpy = jasmine.createSpy(
-        'matcherFactorySpy',
-        matcherFactory
-      );
+      return {
+        compare: function() {
+          return Promise.resolve({ pass: true });
+        }
+      };
+    };
+    const matcherFactorySpy = jasmine.createSpy(
+      'matcherFactorySpy',
+      matcherFactory
+    );
 
     env.it('spec with expectation', function() {
       env.addAsyncMatchers({
@@ -117,19 +117,19 @@ describe('Custom Async Matchers (Integration)', function() {
 
   it('provides custom equality testers to the matcher factory via matchersUtil', async function() {
     const matcherFactory = function(matchersUtil) {
-        return {
-          compare: function(actual, expected) {
-            return Promise.resolve({
-              pass: matchersUtil.equals(actual[0], expected)
-            });
-          }
-        };
-      },
-      customEqualityFn = jasmine
-        .createSpy('customEqualityFn')
-        .and.callFake(function(a, b) {
-          return a.toString() === b;
-        });
+      return {
+        compare: function(actual, expected) {
+          return Promise.resolve({
+            pass: matchersUtil.equals(actual[0], expected)
+          });
+        }
+      };
+    };
+    const customEqualityFn = jasmine
+      .createSpy('customEqualityFn')
+      .and.callFake(function(a, b) {
+        return a.toString() === b;
+      });
 
     env.it('spec with expectation', function() {
       env.addCustomEqualityTester(customEqualityFn);