Fix #46539

src/vs/workbench/parts/markers/electron-browser/markersTreeViewer.ts

@@ -205,11 +205,12 @@ export class Renderer implements IRenderer {
 	private renderMarkerElement(tree: ITree, element: Marker, templateData: IMarkerTemplateData) {
 		let marker = element.raw;
 		templateData.icon.className = 'icon ' + Renderer.iconClassNameFor(marker);
-		templateData.description.set(marker.message, element.messageMatches);
-		templateData.description.element.title = marker.message;
 
-		dom.toggleClass(templateData.source.element, 'marker-source', !!marker.source);
 		templateData.source.set(marker.source, element.sourceMatches);
+		dom.toggleClass(templateData.source.element, 'marker-source', !!marker.source);
+
+		templateData.description.set(marker.message, element.messageMatches);
+		templateData.description.element.title = marker.message;
 
 		templateData.lnCol.textContent = Messages.MARKERS_PANEL_AT_LINE_COL_NUMBER(marker.startLineNumber, marker.startColumn);
 	}

src/vs/workbench/parts/markers/electron-browser/media/markers.css

@@ -71,6 +71,10 @@
 	overflow: hidden;
 }
 
+.markers-panel .markers-panel-container .tree-container .markers-panel-tree-entry .marker-source {
+	margin-right: 5px;
+}
+
 .markers-panel .markers-panel-container .tree-container .markers-panel-tree-entry .marker-source:before {
 	content: '[';
 }