refactor:Simpler and more correct creator methods code.

Author: antononcube

lib/Graph.rakumod

@@ -42,8 +42,8 @@ class Graph
     }
 
     #------------------------------------------------------
-    multi method new(:%adjacency-list = %(), Bool:D :d(:directed-edges(:$directed)) = False, :$vertex-coordinates = Whatever) {
-        self.bless(:%adjacency-list, :$directed, :$vertex-coordinates);
+    multi method new(:%adjacency-list = %(), :@vertexes = Empty, :@edges = Empty, Bool:D :d(:directed-edges(:$directed)) = False, :$vertex-coordinates = Whatever) {
+        self.bless(:%adjacency-list, :$directed, :@vertexes, :@edges, :$vertex-coordinates);
     }
 
     multi method new(%edges, Bool:D :d(:directed-edges(:$directed)) = False, :$vertex-coordinates = Whatever) {
@@ -58,10 +58,6 @@ class Graph
         self.bless(adjacency-list => %(), :$directed, :@vertexes, :@edges, :$vertex-coordinates);
     }
 
-    multi method new(:@vertexes!, :@edges!, Bool:D :d(:directed-edges(:$directed)) = False, :$vertex-coordinates = Whatever) {
-        self.bless(adjacency-list => %(), :$directed, :@vertexes, :@edges, :$vertex-coordinates);
-    }
-
     multi method new(Graph:D $gr, :d(:directed-edges(:$directed)) is copy = Whatever, :$vertex-coordinates = Whatever) {
 
         if $directed.isa(Whatever) { $directed = $gr.directed; }