cleanup: trim trailing whitespace (#11136)

* cleanup: trim trailing whitespace

* update(`.editorconfig`)

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Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/frontend/src/components/MkUserPopup.vue

@@ -195,7 +195,7 @@ onMounted(() => {
 .mfm {
 	display: -webkit-box;
 	-webkit-line-clamp: 5;
-	-webkit-box-orient: vertical;  
+	-webkit-box-orient: vertical;
 	overflow: hidden;
 }