UA19-031: Make Generic_Vector."=" visible.

Also fix a test (the test was added at the same time as the new
provider)

Author: AdrienBoulanger

source/protocol/lsp-generic_vectors.ads

@@ -31,6 +31,11 @@ package LSP.Generic_Vectors is
 
    type Vector is new Element_Vectors.Vector with null record;
 
+   overriding function "=" (Left, Right : Vector) return Boolean is
+     (Element_Vectors."="
+        (Element_Vectors.Vector (Left),
+         Element_Vectors.Vector (Right)));
+
    procedure Read_Vector
      (S : access Ada.Streams.Root_Stream_Type'Class;
       V : out Vector);

testsuite/ada_lsp/completion.duplicates/test.json

@@ -115,6 +115,7 @@
                            "als-other-file",
                            "als-named-parameters",
                            "als-refactor-imports",
+                           "als-refactor-add-parameters",
                            "als-refactor-remove-parameters",
                            "als-refactor-move-parameter",
                            "als-refactor-change-parameter-mode",