When option matches placeholder, .chosen-default should not be added

[silverwind]

Steps to reproduce

1. Open https://jsfiddle.net/silverwind/puqf4gs2/4/
2. Select the 'placeholder' option

Expected behavior

The text in the select box should not be rendered like the placeholder, e.g. the chosen-default class should not be added, so it is possible to visually distinguish between a select element that has a option set vs. one that hasn't.

Actual behavior

The chosen-default class is added and with it, it's almost impossible to see if a item is selected (except the 'x' icon).

Environment

• Chosen Version: 1.8.2
• jQuery or Prototype Version: 3.2.1
• Browser and Version: any
• OS and Version: any

Additional information

I think the issue stems from this line, which does not distinguish between placeholder text and option text when deciding whether to add the chosen-default class:

chosen/coffee/chosen.jquery.coffee

Line 387 in 56b48d4

if text is @default_text

[tjschuck]

Seems legit — please feel free to open a pull request to fix it if you're able and have time!

[silverwind]

Fixed the jsfiddle.