added bit separators

src/render/structure.typ

@@ -36,13 +36,31 @@
         name: str(rank)
       )
 
-      // Range boundaries
-      if rank in boundaries and j != struct.bits - 1 {
-        draw.line(
-          str(rank) + ".north-east",
-          str(rank) + ".south-east",
-          stroke: config.border-color
-        )
+      if j != struct.bits - 1 {
+        let top = str(rank) + ".north-east"
+        let bottom = str(rank) + ".south-east"
+
+        // Group boundary
+        if rank in boundaries {
+          draw.line(
+            top,
+            bottom,
+            stroke: config.border-color
+          )
+        
+        // Bit separator
+        } else {
+          draw.line(
+            top,
+            ((), 20%, bottom),
+            stroke: config.border-color
+          )
+          draw.line(
+            bottom,
+            ((), 20%, top),
+            stroke: config.border-color
+          )
+        }
       }
     }
   })