Fix quote logic regarding code completion

[gvekan]

Fixes #42382

The fix could not be tested in master because of other issues, it is however tested in the 3.2 branch, and the code that is fixed is the same in both branches.

The old code doesn't consider that you can write a single quote between double quotes or vice versa: " ' " or ' " '.

[gvekan]

@Paulb23 While working with other issues I saw that the wrong logic of being in quote also exist here.

godot/scene/gui/text_edit.cpp

Lines 6307 to 6315 in 4b8b8fa

	bool inquote = false;
	int c = ofs - 1;
	while (c >= 0) {
	if (l[c] == '"' || l[c] == '\'') {
	inquote = !inquote;
	}
	c--;
	}

I haven't looked into what the function containing this code does, but it's probably a problem here too, because it's the same bug. Should I fix this in this PR also?

[Paulb23]

Closing as this code has been completely re-written (#45393) so a completely different fix is needed for the linked issue.