test: add indoc to assert_expr macro

crates/aiken-lang/src/parser/utils.rs

@@ -97,14 +97,14 @@ pub fn type_name_with_args() -> impl Parser<Token, (String, Option<Vec<String>>)
 #[macro_export]
 macro_rules! assert_expr {
     ($code:expr) => {
-        let $crate::parser::lexer::LexInfo { tokens, .. } = $crate::parser::lexer::run($code).unwrap();
+        let $crate::parser::lexer::LexInfo { tokens, .. } = $crate::parser::lexer::run(indoc::indoc! { $code }).unwrap();
 
         let stream = chumsky::Stream::from_iter($crate::ast::Span::create(tokens.len()), tokens.into_iter());
 
         let result = $crate::parser::expr::sequence().parse(stream).unwrap();
 
         insta::with_settings!({
-            description => concat!("Code:\n\n", $code),
+            description => concat!("Code:\n\n", indoc::indoc! { $code }),
             prepend_module_to_snapshot => false,
             omit_expression => true
         }, {