From d8a6279fe5fadee4f61171ffd1264ae8573bb438 Mon Sep 17 00:00:00 2001
From: Charlie Marsh <charlie.r.marsh@gmail.com>
Date: Sun, 1 Oct 2023 14:15:43 -0400
Subject: [PATCH] Remove string allocation in relative import formatting
 (#7743)

---
 .../src/statement/stmt_import_from.rs                 | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/crates/ruff_python_formatter/src/statement/stmt_import_from.rs b/crates/ruff_python_formatter/src/statement/stmt_import_from.rs
index 660cc1883b..377d34ef62 100644
--- a/crates/ruff_python_formatter/src/statement/stmt_import_from.rs
+++ b/crates/ruff_python_formatter/src/statement/stmt_import_from.rs
@@ -20,16 +20,17 @@ impl FormatNodeRule<StmtImportFrom> for FormatStmtImportFrom {
             range: _,
         } = item;
 
-        let level_str = level
-            .map(|level| ".".repeat(level as usize))
-            .unwrap_or(String::default());
-
         write!(
             f,
             [
                 token("from"),
                 space(),
-                text(&level_str, None),
+                format_with(|f| {
+                    for _ in 0..level.unwrap_or(0) {
+                        token(".").fmt(f)?;
+                    }
+                    Ok(())
+                }),
                 module.as_ref().map(AsFormat::format),
                 space(),
                 token("import"),