Whitespace or comments following "\" character in multiline statement causes parse error

[WalkingPlaces]

Godot version:

3.2.2.stable.official

OS/device including version:

Windows 10

Issue description:

White-space or comments following "\" character in multiline statement causes parse error.

Steps to reproduce:
Example code:

if flag1 \  # first flag
and flag2:  # second flag
		pass

Causes parse error: Expected newline after '\'.

Minimal reproduction project:

(This is just a gdscript file showing the error. I can format it into a proper project if needed, but I didn't feel that it was necessary as this is simple to reproduce.)
newline_error.zip

[Calinou]

I think this is expected. The same code snippet also fails in Python 3.8 (and 2.7):

flag1 = True
flag2 = True

if flag1 \  # first flag
and flag2:  # second flag
		pass

Running that file results in:

  File "example.py", line 4
    if flag1 \  # first flag
                           ^
SyntaxError: unexpected character after line continuation character