alignment!!!

src/core/span.rs

@@ -33,9 +33,7 @@ impl Widget for Span {
                     let offset = size.axis(self.dir.axis);
                     start.offset += offset;
                     *axis.bot_right.offset = start.offset;
-                    child_region.bot_right.anchor = child_region.top_left.anchor;
-                    let opposite = !self.dir.axis;
-                    *child_region.bot_right.offset.axis_mut(opposite) += size.axis(opposite);
+                    *axis.bot_right.anchor = *axis.top_left.anchor;
                 }
             }
             if self.dir.sign == Sign::Neg {