docs(rust): properly document optional feature

Author: ObserverOfTime

.gitattributes

@@ -13,4 +13,5 @@ setup.py linguist-generated
 Package.swift linguist-generated
 
 bindings/rust/lib.rs -linguist-generated
+bindings/rust/parser.rs -linguist-generated
 bindings/rust/benchmark.rs -linguist-generated

Cargo.toml

@@ -47,3 +47,6 @@ required-features = ["parser"]
 
 [profile.release]
 debug = true
+
+[package.metadata.docs.rs]
+features = ["parser"]

bindings/rust/lib.rs

@@ -54,11 +54,9 @@ pub const NODE_TYPES_INLINE: &str =
     include_str!("../../tree-sitter-markdown-inline/src/node-types.json");
 
 #[cfg(feature = "parser")]
-#[cfg_attr(docsrs, doc(cfg(feature = "parser")))]
 mod parser;
 
 #[cfg(feature = "parser")]
-#[cfg_attr(docsrs, doc(cfg(feature = "parser")))]
 pub use parser::*;
 
 #[cfg(test)]