Example in javadoc of ArgumentMatcher has missing parenthesis
check that

 - [x] The problematic code (if that's possible) is copied here;
       Note that some configuration are impossible to mock via Mockito
 - [x] Read the [contributing guide](https://github.com/mockito/mockito/blob/release/3.x/.github/CONTRIBUTING.md)



The javadoc for ArgumentMatcher contains some example code which misses a pair of parenthesis in one case at https://github.com/mockito/mockito/blob/c86fe047d557bd2ec364d59a99430792f3920e96/src/main/java/org/mockito/ArgumentMatcher.java#L64
src/main/java/org/mockito/ArgumentMatcher.java
src/main/java/org/mockito/ArgumentMatcher.java
diff --git a/src/main/java/org/mockito/ArgumentMatcher.java b/src/main/java/org/mockito/ArgumentMatcher.java
index a1e27c98d6..f51d7e5f79 100644
--- a/src/main/java/org/mockito/ArgumentMatcher.java
+++ b/src/main/java/org/mockito/ArgumentMatcher.java
@@ -61,7 +61,7 @@
  *
  * List mock = mock(List.class);
  *
- * when(mock.addAll(argThat(new ListOfTwoElements))).thenReturn(true);
+ * when(mock.addAll(argThat(new ListOfTwoElements()))).thenReturn(true);
  *
  * mock.addAll(Arrays.asList(&quot;one&quot;, &quot;two&quot;));
  *
