diff --git a/crates/ast-engine/src/replacer.rs b/crates/ast-engine/src/replacer.rs
index 2678944..f656203 100644
--- a/crates/ast-engine/src/replacer.rs
+++ b/crates/ast-engine/src/replacer.rs
@@ -84,6 +84,7 @@ pub use template::{TemplateFix, TemplateFixError};
 ///
 /// ```rust,no_run
 /// # use thread_ast_engine::replacer::Replacer;
+/// # use thread_ast_engine::source::Content;
 /// # use thread_ast_engine::{Doc, NodeMatch};
 /// # use thread_ast_engine::meta_var::Underlying;
 /// struct CustomReplacer;
@@ -91,7 +92,7 @@ pub use template::{TemplateFix, TemplateFixError};
 /// impl<D: Doc<Source = String>> Replacer<D> for CustomReplacer {
 ///     fn generate_replacement(&self, nm: &NodeMatch<'_, D>) -> Underlying<D> {
 ///         // Custom replacement logic here
-///         "new_code".into()
+///         D::Source::decode_str("new_code").into_owned()
 ///     }
 /// }
 /// ```
diff --git a/crates/language/src/lib.rs b/crates/language/src/lib.rs
index 75ee25b..4526faf 100644
--- a/crates/language/src/lib.rs
+++ b/crates/language/src/lib.rs
@@ -30,7 +30,7 @@
 //! use thread_ast_engine::tree_sitter::LanguageExt;
 //!
 //! // Runtime language selection
-//! let lang = SupportLang::from_path("main.rs").unwrap();
+//! let lang = SupportLang::from_path(std::path::Path::new("main.rs")).unwrap();
 //! let tree = lang.ast_grep("fn main() {}");
 //!
 //! // Compile-time language selection
diff --git a/crates/services/src/conversion.rs b/crates/services/src/conversion.rs
index 37d65e4..4e5be78 100644
--- a/crates/services/src/conversion.rs
+++ b/crates/services/src/conversion.rs
@@ -332,4 +332,14 @@ mod tests {
         assert_eq!(info.kind, SymbolKind::Function);
         assert_eq!(info.position, pos);
     }
+
+    #[test]
+    fn test_position_to_range() {
+        let start = Position::new(1, 0, 10);
+        let end = Position::new(2, 5, 25);
+        let range = position_to_range(start, end);
+
+        assert_eq!(range.start, start);
+        assert_eq!(range.end, end);
+    }
 }