Merge #86

86: impl Display for Wkt r=lnicola a=categulario

- [x] I agree to follow the project's [code of conduct](https://github.com/georust/geo/blob/master/CODE_OF_CONDUCT.md).
- [x] I added an entry to `CHANGES.md` if knowledge of this change could be valuable to users.
---

to address #83 and make it easier to go from Wkt to string representation. Includes test

Co-authored-by: Abraham Toriz <[email protected]>

CHANGES.md

@@ -1,5 +1,9 @@
 # Changes
 
+## next release
+### Changed
+* impl `std::fmt::Display` for `Wkt`.
+
 ## 0.10.0 - 2022-02-24
 ### Changed
 * Now accepts `MULTIPOINT`s with fewer parentheses, as output by `ST_AsText` in postgis:

src/lib.rs

@@ -218,6 +218,15 @@ where
     }
 }
 
+impl<T> fmt::Display for Wkt<T>
+where
+    T: WktFloat + fmt::Debug + fmt::Display,
+{
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        self.item.fmt(formatter)
+    }
+}
+
 trait FromTokens<T>: Sized + Default
 where
     T: WktFloat + FromStr + Default,
@@ -336,4 +345,11 @@ mod tests {
             "Point(Point(Some(Coord { x: 1.0, y: 2.0, z: None, m: None })))"
         );
     }
+
+    #[test]
+    fn test_display_on_wkt() {
+        let wktls: Wkt<f64> = Wkt::from_str("LINESTRING(10 20, 20 30)").unwrap();
+
+        assert_eq!(wktls.to_string(), "LINESTRING(10 20,20 30)");
+    }
 }