Shorten the Inspect form of RDF.PrefixMap

lib/rdf/prefix_map.ex

@@ -395,4 +395,20 @@ defmodule RDF.PrefixMap do
     def count(%RDF.PrefixMap{map: map}), do: Enumerable.count(map)
     def slice(_prefix_map), do: {:error, __MODULE__}
   end
+
+  defimpl Inspect do
+    import Inspect.Algebra
+
+    def inspect(prefix_map, opts) do
+      map = Map.to_list(prefix_map.map)
+      open = color("%RDF.PrefixMap{", :map, opts)
+      sep = color(",", :map, opts)
+      close = color("}", :map, opts)
+
+      container_doc(open, map, close, opts, &Inspect.List.keyword/2,
+        separator: sep,
+        break: :strict
+      )
+    end
+  end
 end