tree-wide: make rustdoc links spiky so they are clickable

crates/cfg/src/cfg_expr.rs

@@ -1,6 +1,6 @@
 //! The condition expression used in `#[cfg(..)]` attributes.
 //!
-//! See: https://doc.rust-lang.org/reference/conditional-compilation.html#conditional-compilation
+//! See: <https://doc.rust-lang.org/reference/conditional-compilation.html#conditional-compilation>
 
 use std::{fmt, slice::Iter as SliceIter};
 

crates/cfg/src/lib.rs

@@ -22,7 +22,7 @@ pub use dnf::DnfExpr;
 /// `foo` and `bar` are both enabled. And here, we store key-value options as a set of tuple
 /// of key and value in `key_values`.
 ///
-/// See: https://doc.rust-lang.org/reference/conditional-compilation.html#set-configuration-options
+/// See: <https://doc.rust-lang.org/reference/conditional-compilation.html#set-configuration-options>
 #[derive(Debug, Clone, PartialEq, Eq, Default)]
 pub struct CfgOptions {
     enabled: FxHashSet<CfgAtom>,