CSS beautify changing symantics

[davetclark]

I can't use css beautify because of this bug.

div [attr] :not(.class) {
    color: red;
}

Becomes

div [attr]:not(.class) {
    color: red;
}

Note the lack of space between ] and :

This is my config

{
    "_comment": "Don't edit this file directly. Changes will be overwritten",
    "preserve_newlines": true,
    "jslint_happy": true,
    "keep_array_indentation": false,
    "space_before_conditional": true,
    "max_preserve_newlines": 10,
    "brace_style": "collapse",
    "keep_function_indentation": false,
    "break_chained_methods": false,
    "eval_code": false,
    "unescape_strings": false,
    "wrap_line_length": 0,
    "git_happy": false,
    "end_with_newline": true
}

[chriscoyier]

Confirmed on my side too. This was reported to us at CodePen here.

[bitwiseman]

This will be fixed in 1.6.4, see #985.