Fix some documentation generation warnings

Summary: I tried out `cargo doc` and there were some broken links so I fixed them.

Reviewed By: tmikov

Differential Revision: D31275280

fbshipit-source-id: dc8188a854ad0f1d30d3c88bf4def33d6a3a4a58

unsupported/juno/crates/hermes/src/utf.rs

@@ -99,7 +99,7 @@ fn decode_surrogate_pair(hi: u32, lo: u32) -> u32 {
     ((hi - UTF16_HIGH_SURROGATE) << 10) + (lo - UTF16_LOW_SURROGATE) + 0x10000
 }
 
-/// @param ch the byte at src[from], which also implies that src[from] is a valid index.
+/// @param ch the byte at `src[from]`, which also implies that `src[from]` is a valid index.
 fn decode_utf8<const ALLOW_SURROGATES: bool>(
     src: &[u8],
     from: &mut usize,
@@ -113,7 +113,7 @@ fn decode_utf8<const ALLOW_SURROGATES: bool>(
     }
 }
 
-/// @param ch the byte at src[from], which also implies that src[from] is a valid index.
+/// @param ch the byte at `src[from]`, which also implies that `src[from]` is a valid index.
 fn decode_utf8_slow_path<const ALLOW_SURROGATES: bool>(
     src: &[u8],
     from: &mut usize,

unsupported/juno/crates/juno/src/ast/atom_table.rs

@@ -16,7 +16,7 @@ type NumIndex = u32;
 pub struct AtomTable {
     /// Strings are added here and never removed or mutated.
     strings: Vec<String>,
-    /// Maps from a reference inside [strings] to the index in [strings].
+    /// Maps from a reference inside [`AtomTable::strings`] to the index in [`AtomTable::strings`].
     /// Since strings are never removed or modified, the lifetime of the key
     /// is effectively static.
     map: HashMap<&'static str, NumIndex>,