Wrong cstNode data when using colon newlines

[dhuebner]

Following example:

if sys = "1" then
:     input(0,err=1)'ask'
:     goto *NEXT

An error is reported on line break after then saying "Symbolic label reference may not contain whitespace." which is wrong.
The SymbolicLabelRef CST node text returns oto * but should return *NEXT

[msujew]

The lexer performs a bunch of manipulation when it encounters a line splitter:

bbj-language-server/bbj-vscode/src/language/bbj-lexer.ts

Lines 10 to 35 in 5f4cf23

	private prepareLineSplitter(text: string): string {
	const windowsEol = text.includes('\r\n');
	const lines = text.split(/\r?\n/g);
	for (let i = 0; i < lines.length - 1; i++) {
	const start = i + 1;
	let lineIndex = start;
	let nextLine = lines[lineIndex];
	let end = 0;
	while (nextLine && nextLine.charAt(0) === ':') {
	end = lineIndex;
	nextLine = lines[++lineIndex];
	}
	if (end > 0) {
	let line = lines[i];
	const lineAmount = end - start + 1;
	const replaceLines = new Array<string>(lineAmount).fill('');
	const splitLines = lines.splice(start, lineAmount, ...replaceLines).map(e => e.substring(1));
	const padding = ' '.repeat(splitLines.length);
	line = [line, ...splitLines, padding].join('');
	lines[i] = line;
	i = end;
	}
	}
	const eol = windowsEol ? '\r\n' : '\n';
	return lines.join(eol) + eol;
	}

This results in the lexer processing different text than what is actually contained in the document.