fix search title error

src/main/java/com/power/doc/function/RemoveLineBreaks.java

@@ -11,7 +11,6 @@ public class RemoveLineBreaks implements Function {
   @Override
   public String call(Object[] paras, Context ctx) {
     String str = String.valueOf(paras[0])
-        .replaceAll(" ","")
         .replaceAll("\n", " ")
         .replaceAll("\r"," ");
     return str;