Fix some rustdoc warnings

serde_with/src/lib.rs

@@ -558,7 +558,7 @@ pub struct DisplayFromStr;
 
 /// De/Serialize a [`Option<String>`] type while transforming the empty string to [`None`]
 ///
-/// Convert an [`Option<T>`] from/to string using [`FromStr`] and [`Display`] implementations.
+/// Convert an [`Option<T>`] from/to string using [`FromStr`] and [`Display`](::core::fmt::Display) implementations.
 /// An empty string is deserialized as [`None`] and a [`None`] vice versa.
 ///
 /// # Examples
@@ -1768,7 +1768,7 @@ pub struct PickFirst<T>(PhantomData<T>);
 /// For deserialization the opposite `T: Into<O>` is required.
 /// The `Clone` bound is required since `serialize` operates on a reference but `Into` implementations on references are uncommon.
 ///
-/// **Note**: [`TryFromInto`] is the more generalized version of this adapter which uses the [`TryInto`](std::convert::TryInto) trait instead.
+/// **Note**: [`TryFromInto`] is the more generalized version of this adapter which uses the [`TryInto`] trait instead.
 ///
 /// # Example
 ///
@@ -1849,7 +1849,7 @@ pub struct FromInto<T>(PhantomData<T>);
 /// For serialization `O` needs to be `for<'a> &'a O: Into<T>`.
 /// For deserialization the opposite `T: Into<O>` is required.
 ///
-/// **Note**: [`TryFromIntoRef`] is the more generalized version of this adapter which uses the [`TryInto`](std::convert::TryInto) trait instead.
+/// **Note**: [`TryFromIntoRef`] is the more generalized version of this adapter which uses the [`TryInto`] trait instead.
 ///
 /// # Example
 ///

serde_with/src/schemars_0_8.rs

@@ -121,7 +121,7 @@ pub trait JsonSchemaAs<T: ?Sized> {
     /// Generates a JSON Schema for this type.
     ///
     /// If the returned schema depends on any [referenceable](JsonSchema::is_referenceable) schemas, then this method will
-    /// add them to the [`SchemaGenerator`](gen::SchemaGenerator)'s schema definitions.
+    /// add them to the [`SchemaGenerator`]'s schema definitions.
     ///
     /// This should not return a `$ref` schema.
     fn json_schema(gen: &mut SchemaGenerator) -> Schema;

serde_with_macros/src/lib.rs

@@ -282,8 +282,8 @@ where
 /// The `serialize_always` cannot be used together with a manual `skip_serializing_if` annotations,
 /// as these conflict in their meaning. A compile error will be generated if this occurs.
 ///
-/// The `skip_serializing_none` only works if the type is called [`Option`],
-/// [`std::option::Option`], or [`core::option::Option`]. Type aliasing an [`Option`] and giving it
+/// The `skip_serializing_none` only works if the type is called `Option`,
+/// `std::option::Option`, or `core::option::Option`. Type aliasing an [`Option`] and giving it
 /// another name, will cause this field to be ignored. This cannot be supported, as proc-macros run
 /// before type checking, thus it is not possible to determine if a type alias refers to an
 /// [`Option`].