lib/actions/edit-point.js
function getPrevCode(stream) {
	if (!stream.sof()) {
		const code = stream.backUp(1);
		stream.next();
		return code;
	}
}
function getPrevCode(stream) {
	if (!stream.sof()) {
		const code = stream.backUp(1);
		stream.next();
		return code;
	}
}
function getPrevCode ( stream ) { if ( ! stream . sof ( ) ) { const code = stream . backUp ( 1 ) ; stream . next ( ) ; return code ; } }
Returns precediong character code for current position
@param {BufferStreamReader} stream
@return {Number}
Returns precediong character code for current position