Force New Line Behavior Sketch Plugin

updateLineBehavior.sketchplugin

// Paste this into Plugins > Run Custom Plugin...

var allLayers = context.document.currentPage().children();

for(var i = 0; i < allLayers.count(); i++) {
	if(allLayers[i].class() == 'MSTextLayer') {
		// Set New Line Behavior
		allLayers[i].setPrimitiveUsesNewLineSpacingBehaviour(true);
		// Reset string value to trigger refresh
		allLayers[i].setStringValue(allLayers[i].stringValue())
	}
}