Fix various links in docs.

src/lib.rs

@@ -22,7 +22,7 @@
 //!    used during the simulation.  Thus, it is not
 //!    part of a [``TableCollection``] and is something
 //!    that would only be useful to write when transfering
-//!    final results ot a [``tskit_rust::TableCollection``].
+//!    final results to a [`tskit::TableCollection`](::tskit::TableCollection).
 //! 4. Mutation table data are different. See [``MutationRecord``].
 //! 5. Time is measured as an integer (see [``Time``]),
 //!    as are genomic locations (see [``Position``]).

src/simplification.rs

@@ -636,8 +636,7 @@ impl Default for SimplificationOutput {
 /// During simplification, several large
 /// memory blocks are required. This type
 /// allows those allocations to be re-used
-/// in subsequent calls to
-/// [simplify_tables_with_state](fn.simplify_tables_with_state.html).
+/// in subsequent calls to [``simplify_tables``].
 /// Doing so typically improves run times at
 /// the cost of higher peak memory consumption.
 pub struct SimplificationBuffers {

src/tables.rs

@@ -519,7 +519,7 @@ impl TableCollection {
     ///
     /// The [``u8``] type can be used to encode more complex
     /// state information.  Take a look at the unit tests
-    /// for examples. The [bitfield](https://crates.io/crates/bitfield)
+    /// for examples. The [bitfield](https://docs.rs/bitfield/)
     /// crate may also be useful.
     ///
     /// # Returns
@@ -571,7 +571,7 @@ impl TableCollection {
     ///
     /// The [``u8``] type can be used to encode more complex
     /// state information.  Take a look at the unit tests
-    /// for examples. The [bitfield](https://crates.io/crates/bitfield)
+    /// for examples. The [bitfield](https://docs.rs/bitfield/)
     /// crate may also be useful.
     ///
     /// # Returns