Error when adding brackets in multi-line string

[CitrusWire]

Godot version:
3.2.3

OS/device including version:
Win 7

Issue description:
I'm getting these errors in the Output:

 modules/gdscript/gdscript_tokenizer.cpp:1129 - Condition "tk_rb[ofs].type != TK_IDENTIFIER" is true. Returned: StringName()

Steps to reproduce:

• Add this code into any script:

"""
Hello World
"""

• At the end of either the first line, or the second line, Enter a left bracket: (

Doesn't happen if in the middle of the string, only if at the end.

Edit: Also does it if you add the ( before a ? or !

Minimal reproduction project:
n/a

[Calinou]

Duplicate of #35994.