Enable more clippy lints (#7418)

More is more!

crates/epaint/src/shapes/bezier_shape.rs

@@ -613,6 +613,8 @@ struct FlatteningParameters {
 impl FlatteningParameters {
     // https://raphlinus.github.io/graphics/curves/2019/12/23/flatten-quadbez.html
     pub fn from_curve(curve: &QuadraticBezierShape, tolerance: f32) -> Self {
+        #![expect(clippy::useless_let_if_seq)]
+
         // Map the quadratic bézier segment to y = x^2 parabola.
         let from = curve.points[0];
         let ctrl = curve.points[1];

crates/epaint/src/text/fonts.rs

@@ -1165,6 +1165,7 @@ mod tests {
         ]
     }
 
+    #[expect(clippy::print_stdout)]
     #[test]
     fn test_split_paragraphs() {
         for pixels_per_point in [1.0, 2.0_f32.sqrt(), 2.0] {

crates/epaint/src/text/text_layout.rs

@@ -554,6 +554,8 @@ fn halign_and_justify_row(
     wrap_width: f32,
     justify: bool,
 ) {
+    #![expect(clippy::useless_let_if_seq)] // False positive
+
     let row = Arc::make_mut(&mut placed_row.row);
 
     if row.glyphs.is_empty() {