From 733e7eea5c459c67173e369c1deac3bcde8f03ef Mon Sep 17 00:00:00 2001
From: Parker Moore <parkrmoore@gmail.com>
Date: Tue, 19 May 2015 19:21:52 +0700
Subject: [PATCH] fmt.rs: add note about lack of padding support for some types

---
 src/libcollections/fmt.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/libcollections/fmt.rs b/src/libcollections/fmt.rs
index 80fa6d397c8..cb023bcb7a5 100644
--- a/src/libcollections/fmt.rs
+++ b/src/libcollections/fmt.rs
@@ -353,6 +353,10 @@
 //! * `^` - the argument is center-aligned in `width` columns
 //! * `>` - the argument is right-aligned in `width` columns
 //!
+//! Note that alignment may not be implemented by some types. A good way
+//! to ensure padding is applied is to format your input, then use this
+//! resulting string to pad your output.
+//!
 //! ## Sign/#/0
 //!
 //! These can all be interpreted as flags for a particular formatter.