function parameters merged into single line when starting with ! or [

[dominikschreiber]

Description

Function parameters are merged into a single line when they start with ! (as in !1) or [ (as in [1,2,3]). See below. I experience this behavior in VSCode via the HookyQR.beautify extension while editing JavaScript, but it is reproducible via http://jsbeautifier.org/ as well, with any configuration selected.

Input

The code looked like this before beautification:

fn(
  1,
  !1,
  1,
  [1]
)

Expected Output

The code should have looked like this after beautification (same as Input):

fn(
  1,
  !1,
  1,
  [1]
)

Actual Output

The code actually looked like this after beautification:

fn(
  1, !1,
  1, [1]
)

Steps to Reproduce

Paste the Input into http://jsbeautifier.org/ and hit [CTRL][ENTER].

Environment

OS: Windows 10 (10.0.15063 Build 15063)

Settings

{
    "indent_with_tabs": true,
    "max_preserve_newlines": 2,
    "brace_style": "collapse,preserve-inline",
    "keep_array_indentation": true,
    "keep_function_indentation": true,
    "operator_position": "preserve-newline"
}

But the behavior is reproducible with any configuration on http://jsbeautifier.org that I tried.

[bitwiseman]

Similar to #1288.

Interesting that you have "operator_position": "preserve-newline" and it still doesn't do the right thing.

Also, the array new line isn't preserved either.