print() of empty array using format string does not work

[DarkiStar]

Tested versions

Godot Engine v4.4.dev7.official.46c8f8c5c

System information

Godot v4.4.dev7 - Windows 10 (build 19045)

Issue description

the print of an empty array with a format string does not work like expected.

the print of an empty dictionary with a format string works but has 2 spaces between the brackets.

output test1: %s
Expected output: []
Debugger Message: ... _ready(): String formatting error: not enough arguments for format string. ...

output test2: %s
Expected output: []
Debugger Message: ... _ready(): String formatting error: not enough arguments for format string. ...

output test3: %s
Expected output: []
Debugger Message: ... _ready(): String formatting error: not enough arguments for format string. ...

output test4: {  }
Expected output: {}

output test5: 0
Expected output: 0

output test6: []
Expected output: []

Steps to reproduce

extends Control


func _ready() -> void:
	var test1 : Array
	print('output test1: %s' % test1)
	print('Expected output: []')
	print('Debugger Message: ... _ready(): String formatting error: not enough arguments for format string. ...')
	
	print()
	
	var test2 : Array = []
	print('output test2: %s' % test2)
	print('Expected output: []')
	print('Debugger Message: ... _ready(): String formatting error: not enough arguments for format string. ...')

	print()
	
	var test3 : Array [int] = []
	print('output test3: %s' % test3)
	print('Expected output: []')
	print('Debugger Message: ... _ready(): String formatting error: not enough arguments for format string. ...')

	print()
	
	var test4 : Dictionary
	print('output test4: %s' % test4) 
	print('Expected output: {}')

	print()

	var test5 : int
	print('output test5: %s' % test5)
	print('Expected output: 0')

	print()

	var test6 : Array
	prints('output test6:', test6)
	print('Expected output: []')

Minimal reproduction project (MRP)

see steps to reproduce

[AThousandShips]

I'd say this is to be expected, you need an array of one element and providing one with zero, it should be:

var test1 : Array
print('output test1: %s' % [test1])
print('Expected output: []')
print('Debugger Message: ... _ready(): String formatting error: not enough arguments for format string. ...')
	
print()
	
var test2 : Array = []
print('output test2: %s' % [test2])
print('Expected output: []')
print('Debugger Message: ... _ready(): String formatting error: not enough arguments for format string. ...')

print()
	
var test3 : Array [int] = []
print('output test3: %s' % [test3])
print('Expected output: []')
print('Debugger Message: ... _ready(): String formatting error: not enough arguments for format string. ...')

[DarkiStar]

But why does it work with a dictionary?

[AThousandShips]

Because % doesn't support Dictionary formatting like String.format does AFAIK, it just treats it the same way as "test: %s" % 1 or any other non-Array case

[DarkiStar]

Because % doesn't support Dictionary formatting like String.format does AFAIK, it just treats it the same way as "test: %s" % 1 or any other non-Array case

But Dictionary worked with % (see test4 in my example).

[AThousandShips]

Yes as I said, it just treats Dictionary as any other value, it doesn't support formatting like so:

print("User {id} is {name}.".format({"id": 42, "name": "Godot"}))