improve center/align docs of container

widget/src/container.rs

@@ -153,8 +153,8 @@ where
         self.height(height).align_y(alignment::Vertical::Center)
     }
 
-    /// Centers the contents in both the horizontal and vertical axes of the
+    /// Sets the width and height of the [`Container`] and centers its contents in
-    /// [`Container`].
+    /// both the horizontal and vertical axes.
     ///
     /// This is equivalent to chaining [`center_x`] and [`center_y`].
     ///
@@ -166,22 +166,22 @@ where
         self.center_x(length).center_y(length)
     }
 
-    /// Aligns the contents of the [`Container`] to the left.
+    /// Sets the width of the [`Container`] and aligns its contents to the left.
     pub fn align_left(self, width: impl Into<Length>) -> Self {
         self.width(width).align_x(alignment::Horizontal::Left)
     }
 
-    /// Aligns the contents of the [`Container`] to the right.
+    /// Sets the width of the [`Container`] and aligns its contents to the right.
     pub fn align_right(self, width: impl Into<Length>) -> Self {
         self.width(width).align_x(alignment::Horizontal::Right)
     }
 
-    /// Aligns the contents of the [`Container`] to the top.
+    /// Sets the height of the [`Container`] and aligns its contents to the top.
     pub fn align_top(self, height: impl Into<Length>) -> Self {
         self.height(height).align_y(alignment::Vertical::Top)
     }
 
-    /// Aligns the contents of the [`Container`] to the bottom.
+    /// Sets the height of the [`Container`] and aligns its contents to the bottom.
     pub fn align_bottom(self, height: impl Into<Length>) -> Self {
         self.height(height).align_y(alignment::Vertical::Bottom)
     }