Single quotes not backticks in errors to match DataFusion (#9)

src/common.rs

@@ -8,15 +8,15 @@ use jiter::{Jiter, JiterError, Peek};
 
 pub fn check_args(args: &[DataType], fn_name: &str) -> DataFusionResult<()> {
     let Some(first) = args.first() else {
-        return plan_err!("The `{fn_name}` function requires one or more arguments.");
+        return plan_err!("The '{fn_name}' function requires one or more arguments.");
     };
     if !matches!(first, DataType::Utf8 | DataType::LargeUtf8) {
-        return plan_err!("Unexpected argument type to `{fn_name}` at position 1, expected a string.");
+        return plan_err!("Unexpected argument type to '{fn_name}' at position 1, expected a string.");
     }
     args[1..].iter().enumerate().try_for_each(|(index, arg)| match arg {
         DataType::Utf8 | DataType::LargeUtf8 | DataType::UInt64 | DataType::Int64 => Ok(()),
         _ => plan_err!(
-            "Unexpected argument type to `{fn_name}` at position {}, expected string or int.",
+            "Unexpected argument type to '{fn_name}' at position {}, expected string or int.",
             index + 2
         ),
     })

src/json_contains.rs

@@ -46,7 +46,7 @@ impl ScalarUDFImpl for JsonContains {
 
     fn return_type(&self, arg_types: &[DataType]) -> Result<DataType> {
         if arg_types.len() < 2 {
-            plan_err!("The `json_contains` function requires two or more arguments.")
+            plan_err!("The 'json_contains' function requires two or more arguments.")
         } else {
             check_args(arg_types, self.name()).map(|()| DataType::Boolean)
         }

tests/main.rs

@@ -185,7 +185,7 @@ async fn test_json_get_str_null() {
 
     assert_eq!(
         e.to_string(),
-        "Error during planning: Unexpected argument type to `json_get_str` at position 2, expected string or int."
+        "Error during planning: Unexpected argument type to 'json_get_str' at position 2, expected string or int."
     );
 }