adjustSize(): add support for edge chars

boxes/__init__.py

@@ -522,6 +522,10 @@ class Boxes:
         self.addPart(parts.Parts(self))
 
     def adjustSize(self, l, e1=True, e2=True):
+        # Char to edge object
+        e1 = self.edges.get(e1, e1)
+        e2 = self.edges.get(e2, e2)
+
         try:
             total = sum(l)
             walls = (len(l) - 1) * self.thickness
@@ -535,7 +539,7 @@ class Boxes:
             walls += self.thickness
 
         if isinstance(e2, edges.BaseEdge):
-            walls += e2.startwidth + e2.margin()
+            walls += e2.startwidth() + e2.margin()
         elif e2:
             walls += self.thickness