Mask return type in safe string.

Author: raphw

byte-buddy-dep/src/main/java/net/bytebuddy/description/method/MethodDescription.java

@@ -1049,7 +1049,7 @@ protected String toSafeString() {
                 stringBuilder.append(Modifier.toString(modifiers)).append(' ');
             }
             if (isMethod()) {
-                stringBuilder.append(getReturnType().asErasure().getActualName()).append(' ');
+                stringBuilder.append('?').append(' ');
                 stringBuilder.append(getDeclaringType().asErasure().getActualName()).append('.');
             }
             return stringBuilder.append(getName()).append("(?)").toString();