Option to preserve self-closing tags

[tumatanquang]

Description

The change in issue #1478 caused self-closing tags to automatically add a space before the slash when formatted. However, this syntax is XHTML, and is not necessary in HTML5.
So I hope there will be an option to preserve self-closing tags when formatting HTML.

Input

The code looked like this before beautification:

<input type="text"/>
<br/>
<input type="number" />
<hr/>
<input type="email"/>

Expected Output

The code should have looked like this after beautification:

<input type="text"/>
<br/>
<input type="number" />
<hr/>
<input type="email"/>

Actual Output

The code actually looked like this after beautification:

<input type="text" />
<br />
<input type="number" />
<hr />
<input type="email" />

Steps to Reproduce

Environment

OS: Browser, CLI

Settings

{
  "indent_size": 4,
  "indent_char": " ",
  "indent_with_tabs": false,
  "eol": "\n",
  "end_with_newline": false,
  "editorconfig": false,
  "indent_level": 0,
  "preserve_newlines": true,
  "max_preserve_newlines": 0,
  "space_in_paren": false,
  "space_in_empty_paren": false,
  "jslint_happy": false,
  "space_after_anon_function": false,
  "space_after_named_function": false,
  "brace_style": "end-expand,preserve-inline",
  "unindent_chained_methods": false,
  "break_chained_methods": false,
  "keep_array_indentation": false,
  "unescape_strings": false,
  "wrap_line_length": 0,
  "e4x": false,
  "good_stuff": false,
  "comma_first": false,
  "operator_position": "preserve-newline",
  "indent_empty_lines": false,
  "eval_code": false,
  "space_before_conditional": false,
  "templating": [
    "auto"
  ],
  "css": {
    "indent_size": 4,
    "indent_char": "\t",
    "indent_with_tabs": true,
    "eol": "\n",
    "end_with_newline": false,
    "brace_style": "collapse",
    "selector_separator_newline": false,
    "newline_between_rules": false,
    "indent_empty_lines": false,
    "wrap_line_length": 0
  },
  "html": {
    "indent_size": 4,
    "indent_char": "\t",
    "indent_with_tabs": true,
    "eol": "\n",
    "end_with_newline": false,
    "preserve_newlines": true,
    "max_preserve_newlines": 0,
    "indent_inner_html": true,
    "brace_style": "end-expand",
    "indent_scripts": "normal",
    "wrap_line_length": 0,
    "wrap_attributes": "preserve-aligned",
    "wrap_attributes_min_attrs": -1,
    "extra_liners": [],
    "editorconfig": false,
    "indent_empty_lines": false,
    "templating": [
      "auto"
    ]
  }
}