Refine each boundary checking logic

src/compiler/compile/render-dom/wrappers/Fragment.ts

@@ -42,6 +42,10 @@ function link(next: Wrapper, prev: Wrapper) {
 	if (next) next.prev = prev;
 }
 
+function at_each_boundary(child: INode, next_sibling: Wrapper): boolean {
+	return next_sibling.node.find_nearest(/EachBlock/) === child.find_nearest(/EachBlock/) || next_sibling.node.prev.type === 'EachBlock'
+} 
+
 export default class FragmentWrapper {
 	nodes: Wrapper[];
 
@@ -85,7 +89,7 @@ export default class FragmentWrapper {
 				if (this.nodes.length === 0) {
 					const should_trim = (
 						// @ts-ignore todo: probably error, should it be next_sibling.node.data?
-						next_sibling ? (next_sibling.node.type === 'Text' && /^\s/.test(next_sibling.data) && next_sibling.node.find_nearest(/EachBlock/) === child.find_nearest(/EachBlock/)) : !child.has_ancestor('EachBlock')
+						next_sibling ? (next_sibling.node.type === 'Text' && /^\s/.test(next_sibling.data) && at_each_boundary(child, next_sibling)) : !child.has_ancestor('EachBlock')
 					);
 
 					if (should_trim) {