Minor linting fixes

lib/oxsdatatypes/README.md

@@ -38,7 +38,7 @@ The `DateTime::now()` function needs special OS support.
 Currently:
 - If the `custom-now` feature is enabled, a function computing `now` must be set:
   ```rust
-   use oxsdatatypes::Duration;
+  use oxsdatatypes::Duration;
   
   #[no_mangle]
   fn custom_ox_now() -> Duration {

lib/oxsdatatypes/src/duration.rs

@@ -973,7 +973,7 @@ impl fmt::Display for DurationOverflowError {
 
 impl Error for DurationOverflowError {}
 
-/// The year-month and the day-time components of a [`Duration\] have an opposite sign.
+/// The year-month and the day-time components of a [`Duration`] have an opposite sign.
 #[derive(Debug, Clone, Copy)]
 pub struct OppositeSignInDurationComponentsError;