Invalid syntax error report in case of multiline.

[onlyati]

Issue description

If the Quadlet's property value starting in a new line, then the syntax checker believes that it has no value. For example:

[Container]
Image= \
  foo.image

But this is fine, because it starts with a value:

[Unit]
Description=This is the \
  description of foo bar

Expected behaviour

This is fine from Quadlet syntax perspective.

Additional documents

No response

What IDE do you use?

Neovim

Additional context

none