fix doctest and compile error on rustc 1.46

Author: 38

README.md

@@ -363,13 +363,14 @@ For example, we can have an element which includes a dot and its coordinate.
 
 ```rust
 use plotters::prelude::*;
+use plotters::coord::types::RangedCoordf32;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let root = BitMapBackend::new("plotters-doc-data/4.png", (640, 480)).into_drawing_area();
 
     root.fill(&RGBColor(240, 200, 200))?;
 
-    let root = root.apply_coord_spec(RangedCoord::<RangedCoordf32, RangedCoordf32>::new(
+    let root = root.apply_coord_spec(Cartesian2d::<RangedCoordf32, RangedCoordf32>::new(
         0f32..1f32,
         0f32..1f32,
         (0..640, 0..480),

doc-template/examples/composable_elements.rs

@@ -1,11 +1,12 @@
 use plotters::prelude::*;
+use plotters::coord::types::RangedCoordf32;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let root = BitMapBackend::new("plotters-doc-data/4.png", (640, 480)).into_drawing_area();
 
     root.fill(&RGBColor(240, 200, 200))?;
 
-    let root = root.apply_coord_spec(RangedCoord::<RangedCoordf32, RangedCoordf32>::new(
+    let root = root.apply_coord_spec(Cartesian2d::<RangedCoordf32, RangedCoordf32>::new(
         0f32..1f32,
         0f32..1f32,
         (0..640, 0..480),

plotters-doc-data

@@ -21,7 +21,7 @@ impl<'a, DB: DrawingBackend> SeriesAnno<'a, DB> {
         self.label.as_ref().map(|x| x.as_str()).unwrap_or("")
     }
 
-    pub(crate) fn get_draw_func(&self) -> Option<&SeriesAnnoDrawFn<DB>> {
+    pub(crate) fn get_draw_func(&self) -> Option<&SeriesAnnoDrawFn<'a, DB>> {
         self.draw_func.as_ref().map(|x| x.as_ref())
     }
 

src/chart/series.rs

@@ -484,13 +484,14 @@ For example, we can have an element which includes a dot and its coordinate.
 
 ```rust
 use plotters::prelude::*;
+use plotters::coord::types::RangedCoordf32;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let root = BitMapBackend::new("plotters-doc-data/4.png", (640, 480)).into_drawing_area();
 
     root.fill(&RGBColor(240, 200, 200))?;
 
-    let root = root.apply_coord_spec(RangedCoord::<RangedCoordf32, RangedCoordf32>::new(
+    let root = root.apply_coord_spec(Cartesian2d::<RangedCoordf32, RangedCoordf32>::new(
         0f32..1f32,
         0f32..1f32,
         (0..640, 0..480),