Use find in indent detection

crates/ruff_python_codegen/src/stylist.rs

@@ -106,13 +106,7 @@ fn detect_indention(tokens: &[LexResult], locator: &Locator) -> Indentation {
                 }
                 TokenKind::NonLogicalNewline => {
                     let line = locator.line(range.end());
-                    let indent_index = line.char_indices().find_map(|(i, c)| {
-                        if c.is_whitespace() {
-                            None
-                        } else {
-                            Some(i)
-                        }
-                    });
+                    let indent_index = line.find(|c: char| !c.is_whitespace());
                     if let Some(indent_index) = indent_index {
                         if indent_index > 0 {
                             let whitespace = &line[..indent_index];
@@ -229,20 +223,6 @@ x = (
             &Indentation("  ".to_string())
         );
 
-        let contents = r"
-x = (
- 1,
- 2,
- 3,
-)
-";
-        let locator = Locator::new(contents);
-        let tokens: Vec<_> = lex(contents, Mode::Module).collect();
-        assert_eq!(
-            Stylist::from_tokens(&tokens, &locator).indentation(),
-            &Indentation(" ".to_string())
-        );
-
         // formfeed indent, see `detect_indention` comment.
         let contents = r"
 class FormFeedIndent: