doc: fix small things on expression

src/widgets.rs

@@ -1,7 +1,7 @@
 //! `widgets` is a collection of types that implement [`Widget`] or [`StatefulWidget`] or both.
 //!
-//! All widgets are implemented by the fluent interface and are consumable objects. They are not
-//! meant to be stored but used as *commands* to draw common figures in the UI.
+//! Widgets are created for each frame as they are consumed after rendered.
+//! They are not meant to be stored but used as *commands* to draw common figures in the UI.
 //!
 //! The available widgets are:
 //! - [`Block`]: a basic widget that draws a block with optional borders, titles and styles.

src/widgets/sparkline.rs

@@ -18,7 +18,7 @@ use crate::{
 /// `Sparkline` can be styled either using [`Sparkline::style`] or preferably using the methods
 /// provided by the [`Stylize`](crate::style::Stylize) trait.
 ///
-/// # Fluent setters
+/// # Setter methods
 ///
 /// - [`Sparkline::block`] wraps the sparkline in a [`Block`]
 /// - [`Sparkline::data`] defines the dataset, you'll almost always want to use it