update yargs; closes #3742

lib/cli/cli.js

@@ -13,7 +13,7 @@ const debug = require('debug')('mocha:cli:cli');
 const symbols = require('log-symbols');
 const yargs = require('yargs');
 const path = require('path');
-const {loadOptions} = require('./options');
+const {loadOptions, YARGS_PARSER_CONFIG} = require('./options');
 const commands = require('./commands');
 const ansi = require('ansi-colors');
 const {repository, homepage, version, gitter} = require('../../package.json');
@@ -59,6 +59,7 @@ exports.main = (argv = process.argv.slice(2)) => {
     Docs: ${ansi.yellow(homepage)}
       `
     )
+    .parserConfiguration(YARGS_PARSER_CONFIG)
     .parse(argv, loadOptions(argv));
 };
 

lib/cli/options.js

@@ -11,7 +11,6 @@ const yargsParser = require('yargs-parser');
 const {types, aliases} = require('./run-option-metadata');
 const {ONE_AND_DONE_ARGS} = require('./one-and-dones');
 const mocharc = require('../mocharc.json');
-const yargsParserConfig = require('../../package.json').yargs;
 const {list} = require('./run-helpers');
 const {loadConfig, findConfig} = require('./config');
 const findup = require('findup-sync');
@@ -32,6 +31,16 @@ const {isNodeFlag} = require('./node-flags');
  * @interface Arguments
  */
 
+/**
+ * Base yargs parser configuration
+ * @private
+ */
+const YARGS_PARSER_CONFIG = {
+  'combine-arrays': true,
+  'short-option-groups': false,
+  'dot-notation': false
+};
+
 /**
  * This is the config pulled from the `yargs` property of Mocha's
  * `package.json`, but it also disables camel case expansion as to
@@ -40,7 +49,7 @@ const {isNodeFlag} = require('./node-flags');
  * @private
  * @ignore
  */
-const configuration = Object.assign({}, yargsParserConfig, {
+const configuration = Object.assign({}, YARGS_PARSER_CONFIG, {
   'camel-case-expansion': false
 });
 
@@ -335,3 +344,4 @@ const loadOptions = (argv = []) => {
 };
 
 module.exports.loadOptions = loadOptions;
+module.exports.YARGS_PARSER_CONFIG = YARGS_PARSER_CONFIG;