From 814f4f6f526b302bda9a464130b97502e39cc490 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beno=C3=AEt=20du=20Garreau?= <bdgdlm@outlook.com>
Date: Tue, 16 May 2023 17:10:25 +0200
Subject: [PATCH] Improve `PadAdapter::write_char`

---
 library/core/src/fmt/builders.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/library/core/src/fmt/builders.rs b/library/core/src/fmt/builders.rs
index d2c9f980042..9227248041e 100644
--- a/library/core/src/fmt/builders.rs
+++ b/library/core/src/fmt/builders.rs
@@ -40,6 +40,14 @@ impl fmt::Write for PadAdapter<'_, '_> {
 
         Ok(())
     }
+
+    fn write_char(&mut self, c: char) -> fmt::Result {
+        if self.state.on_newline {
+            self.buf.write_str("    ")?;
+        }
+        self.state.on_newline = c == '\n';
+        self.buf.write_char(c)
+    }
 }
 
 /// A struct to help with [`fmt::Debug`](Debug) implementations.