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/helpers/integrationMatchers.js

@@ -4,9 +4,10 @@
       toHaveFailedExpectationsForRunnable: function() {
         return {
           compare: function(actual, fullName, expectedFailures) {
-            let foundRunnable = false,
-              expectations = true,
-              foundFailures = [];
+            let foundRunnable = false;
+            let expectations = true;
+            let foundFailures = [];
+
             for (let i = 0; i < actual.calls.count(); i++) {
               const args = actual.calls.argsFor(i)[0];
 

spec/helpers/nodeDefineJasmineUnderTest.js

@@ -1,6 +1,6 @@
 (function() {
-  const path = require('path'),
-    glob = require('glob');
+  const path = require('path');
+  const glob = require('glob');
 
   const jasmineUnderTestRequire = require(path.join(
     __dirname,