[Ada] Tune whitespace of the bounded lists Aggregate aspect

[Pierre-Marie de Rodat via Gcc-patches]

Whitespace cleanup only.

Tested on x86_64-pc-linux-gnu, committed on trunk

gcc/ada/

        * libgnat/a-cbdlli.ads (List): Remove extra space in Aggregate
        aspect.
diff --git a/gcc/ada/libgnat/a-cbdlli.ads b/gcc/ada/libgnat/a-cbdlli.ads
--- a/gcc/ada/libgnat/a-cbdlli.ads
+++ b/gcc/ada/libgnat/a-cbdlli.ads
@@ -56,8 +56,8 @@ is
       Variable_Indexing => Reference,
       Default_Iterator  => Iterate,
       Iterator_Element  => Element_Type,
-      Aggregate         => (Empty        => Empty,
-                            Add_Unnamed  => Append),
+      Aggregate         => (Empty       => Empty,
+                            Add_Unnamed => Append),
       Preelaborable_Initialization
                         => Element_Type'Preelaborable_Initialization;