Doc symbol empty name becomes space

Author: BoykoAlex

headless-services/commons/commons-yaml/src/main/java/org/springframework/ide/vscode/commons/yaml/reconcile/TypeBasedYamlSymbolHandler.java

@@ -88,7 +88,7 @@ protected DocumentSymbol createSymbol(TextDocument doc, Node node, YType type) t
 		Range range = doc.toRange(region.getStart(), region.getLength());
 
 		DocumentSymbol symbol = new DocumentSymbol();
-		symbol.setName(region.toString());
+		symbol.setName(region.toString().isEmpty() ? " " : region.toString());
 		symbol.setKind(symbolKind(type));
 		symbol.setRange(range);
 		symbol.setSelectionRange(range);