gh-123579: document exclamation token

Glyphack · Glyphack · commit c7372e6954af · 2024-09-02T12:39:36.000-07:00
diff --git a/Doc/reference/lexical_analysis.rst b/Doc/reference/lexical_analysis.rst
@@ -1003,7 +1003,7 @@ The following tokens are operators:
 
    +       -       *       **      /       //      %      @
    <<      >>      &       |       ^       ~       :=
-   <       >       <=      >=      ==      !=
+   <       >       <=      >=      ==      !=      !
 
 
 .. _delimiters:
