ci: add drone tests

.drone.yml

@@ -0,0 +1,13 @@
+---
+kind: pipeline
+name: normal
+type: docker
+
+steps:
+  - name: test
+    image: rust:1.31
+    pull: true
+    commands:
+    - cargo build
+    - cargo test
+    - cargo fmt -- --check

src/nested_type.rs

@@ -12,8 +12,9 @@ impl Type {
     ///
     /// Creating a simple type and converting it into a python type String
     /// ```
+    /// # use parsing::nested_type::Type;
     /// let my_type = Type{repr: "Type".into(), ..Default::default()};
-    /// my_type.to_python()
+    /// my_type.to_python();
     /// ```
     pub fn to_python(&self) -> String {
         match self.subtypes.len() {