Fix errors reported by the no-useless-concat ESLint rule

http://eslint.org/docs/rules/no-useless-concat

test/test.js

@@ -81,7 +81,7 @@ function parseOptions() {
       'test_manifest.json'))
     .check(describeCheck(function (argv) {
       return !argv.browser || !argv.browserManifestFile;
-    }, '--browser and --browserManifestFile must not be specified at the ' +'' +
+    }, '--browser and --browserManifestFile must not be specified at the ' +
       'same time.'));
   var result = yargs.argv;
   if (result.help) {

test/unit/type1_parser_spec.js

@@ -73,7 +73,7 @@ describe('Type1Parser', function() {
       'dup 0 1 RD x noaccess put\n'+
       'end\n' +
       '/CharStrings 46 dict dup begin\n' +
-      '/.notdef 1 RD x ND' + '\n' +
+      '/.notdef 1 RD x ND\n' +
       'end');
     var parser = new Type1Parser(stream, false, SEAC_ANALYSIS_ENABLED);
     var program = parser.extractFontProgram();