doc: Fix links.

Since the `intra-doc-links` feature has been stabilized, we can see
more clearly that we have many broken links. This PR is an attempt to
fix them!

lib/compiler/src/error.rs

@@ -80,7 +80,7 @@ pub enum WasmError {
 }
 
 /// The error that can happen while parsing a `str`
-/// to retrieve a [`CpuFeature`].
+/// to retrieve a [`CpuFeature`](crate::target::CpuFeature).
 #[derive(Debug)]
 #[cfg_attr(feature = "std", derive(Error))]
 pub enum ParseCpuFeatureError {

lib/compiler/src/function.rs

@@ -82,8 +82,8 @@ pub type CustomSections = PrimaryMap<SectionIndex, CustomSection>;
 #[derive(Debug, PartialEq, Eq, Clone)]
 pub struct Dwarf {
     /// The section index in the [`Compilation`] that corresponds to the exception frames.
-    /// More info:
-    /// https://refspecs.linuxfoundation.org/LSB_3.0.0/LSB-PDA/LSB-PDA/ehframechpt.html
+    /// [Learn
+    /// more](https://refspecs.linuxfoundation.org/LSB_3.0.0/LSB-PDA/LSB-PDA/ehframechpt.html).
     pub eh_frame: SectionIndex,
 }
 

lib/compiler/src/jump_table.rs

@@ -2,7 +2,7 @@
 //! to another part of a program (or a different program that may have
 //! been dynamically loaded) using a table of branch or jump instructions.
 //!
-//! Source: https://en.wikipedia.org/wiki/Branch_table
+//! [Learn more](https://en.wikipedia.org/wiki/Branch_table).
 
 use super::CodeOffset;
 #[cfg(feature = "enable-serde")]

lib/compiler/src/relocation.rs

@@ -2,7 +2,7 @@
 //! code and data of a program and adjusting the code and data to reflect the
 //! assigned addresses.
 //!
-//! Source: https://en.wikipedia.org/wiki/Relocation_(computing)
+//! [Learn more](https://en.wikipedia.org/wiki/Relocation_(computing)).
 //!
 //! Each time a `Compiler` compiles a WebAssembly function (into machine code),
 //! it also attaches if there are any relocations that need to be patched into

lib/compiler/src/unwind.rs

@@ -4,7 +4,7 @@
 //! called the function that threw the exception, and which
 //! function called that one, and so forth.
 //!
-//! More info: https://en.wikipedia.org/wiki/Call_stack
+//! [Learn more](https://en.wikipedia.org/wiki/Call_stack).
 use crate::lib::std::vec::Vec;
 #[cfg(feature = "enable-serde")]
 use serde::{Deserialize, Serialize};