Move glyph reset to stretch function

crates/typst-layout/src/math/fragment.rs

@@ -437,6 +437,8 @@ impl GlyphFragment {
     ///
     /// The resulting frame may not have the exact desired width or height.
     pub fn stretch(&mut self, ctx: &mut MathContext, target: Abs, axis: Axis) {
+        self.reset_glyph();
+
         // If the base glyph is good enough, use it.
         let mut advance = self.size.get(axis);
         if axis == Axis::X && !self.extended_shape {

crates/typst-layout/src/math/stretch.rs

@@ -60,8 +60,6 @@ pub fn stretch_fragment(
         }
     };
 
-    glyph.reset_glyph();
-
     let relative_to_size = relative_to.unwrap_or_else(|| size.get(stretch_axis));
 
     glyph.stretch(ctx, stretch.relative_to(relative_to_size) - short_fall, stretch_axis);