Fix wording of warning-and-invariant-args linter

The wording for an incorrect number of arguments based on counting %s
substitutions. The previous wording was backwards and a bit yoda-like
leading to possible ambiguity.

Author: bgw

eslint-rules/__tests__/warning-and-invariant-args-test.js

@@ -51,17 +51,19 @@ eslintTester.addRuleTest('eslint-rules/warning-and-invariant-args', {
       code: "warning(true, 'expected %s, got %s');",
       errors: [
         {
-          message: 'Expected 4 arguments in call to warning, but got 2 ' +
-                   'based on the number of "%s" substitutions',
+          message:
+            'Expected 4 arguments in call to warning based on the number of ' +
+            '"%s" substitutions, but got 2',
         },
       ],
     },
     {
       code: "warning(true, 'foobar', 'junk argument');",
       errors: [
         {
-          message: 'Expected 2 arguments in call to warning, but got 3 ' +
-                   'based on the number of "%s" substitutions',
+          message:
+            'Expected 2 arguments in call to warning based on the number of ' +
+            '"%s" substitutions, but got 3',
         },
       ],
     },

eslint-rules/warning-and-invariant-args.js

@@ -63,8 +63,8 @@ module.exports = function(context) {
       if (node.arguments.length !== expectedNArgs) {
         context.report(
           node,
-          'Expected {{expectedNArgs}} arguments in call to {{name}}, but ' +
-          'got {{length}} based on the number of "%s" substitutions',
+          'Expected {{expectedNArgs}} arguments in call to {{name}} based on ' +
+          'the number of "%s" substitutions, but got {{length}}',
           {
             expectedNArgs: expectedNArgs,
             name: node.callee.name,