test: fix quote_

Author: takaokouji

test/unit/lib/ruby-generator.test.jsx

@@ -15,7 +15,7 @@ describe('RubyGenerator', () => {
     describe('quote_', () => {
         test('escape only " to \\"', () => {
             const arg = '!"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~'; // eslint-disable-line
-            const expected = '"!\\"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~"'; // eslint-disable-line
+            const expected = '"!\\"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\\\]^_`abcdefghijklmnopqrstuvwxyz{|}~"'; // eslint-disable-line
             expect(RubyGenerator.quote_(arg)).toEqual(expected);
         });
     });