Forbid uses of unwrap() in the code (#7795)

crates/epaint/src/mesh.rs

@@ -281,7 +281,12 @@ impl Mesh {
             let mesh = Mesh16 {
                 indices: self.indices[span_start..index_cursor]
                     .iter()
-                    .map(|vi| u16::try_from(vi - min_vindex).unwrap())
+                    .map(|vi| {
+                        #[expect(clippy::unwrap_used)]
+                        {
+                            u16::try_from(vi - min_vindex).unwrap()
+                        }
+                    })
                     .collect(),
                 vertices: self.vertices[(min_vindex as usize)..=(max_vindex as usize)].to_vec(),
                 texture_id: self.texture_id,

crates/epaint/src/tessellator.rs

@@ -1403,6 +1403,7 @@ impl Tessellator {
             });
         }
 
+        #[expect(clippy::unwrap_used)] // it's never empty
         let out = out_primitives.last_mut().unwrap();
 
         if let Primitive::Mesh(out_mesh) = &mut out.primitive {

crates/epaint/src/text/text_layout.rs

@@ -1,3 +1,5 @@
+#![expect(clippy::unwrap_used)] // TODO(emilk): remove unwraps
+
 use std::sync::Arc;
 
 use emath::{Align, GuiRounding as _, NumExt as _, Pos2, Rect, Vec2, pos2, vec2};