Change wire padding behavior

Addresses #131

src/wireviz/Harness.py

@@ -139,6 +139,16 @@ def create_graph(self) -> Graph:
                     dot.edge(f'{connector.name}:p{loop[0]}{loop_side}:{loop_dir}',
                              f'{connector.name}:p{loop[1]}{loop_side}:{loop_dir}')
 
+        # determine if there are double- or triple-colored wires in the harness;
+        # if so, pad single-color wires to make all wires of equal thickness
+        for _, cable in self.cables.items():
+            colorlengths = list(map(len, cable.colors))
+            if 4 in colorlengths or 6 in colorlengths:
+                pad = True
+                break
+        else:
+            pad = False
+
         for _, cable in self.cables.items():
 
             awg_fmt = ''
@@ -187,11 +197,6 @@ def create_graph(self) -> Graph:
 
             html = f'{html}<tr><td><table border="0" cellspacing="0" cellborder="0">'  # conductor table
 
-            # determine if there are double- or triple-colored wires;
-            # if so, pad single-color wires to make all wires of equal thickness
-            colorlengths = list(map(len, cable.colors))
-            pad = 4 in colorlengths or 6 in colorlengths
-
             for i, connection_color in enumerate(cable.colors, 1):
                 p = []
                 p.append(f'<!-- {i}_in -->')