Fix a typo in std::panic

diff --git a/src/libstd/macros.rs b/src/libstd/macros.rs
index 96c92ceb5bb4127052b311a03b2ed4b5b86f6625..15fbb10592133f38112e8a022deaae6fff760a40 100644 (file)
--- a/src/libstd/macros.rs
+++ b/src/libstd/macros.rs
@@ -16,7 +16,7 @@
 
 /// The entry point for panic of Rust threads.
 ///
-/// This allows a program to to terminate immediately and provide feedback
+/// This allows a program to terminate immediately and provide feedback
 /// to the caller of the program. `panic!` should be used when a program reaches
 /// an unrecoverable problem.
 ///