Fix typo in bootstrap/lib.rs.

diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 94c14f7ea254664902d390557a0bb0dda87bbcc8..a1424bf3aaa4a10ef77b293f5a46387d00531bc6 100644 (file)
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -46,7 +46,7 @@
 /// * The error itself
 ///
 /// This is currently used judiciously throughout the build system rather than
-/// using a `Result` with `try!`, but this may change on day...
+/// using a `Result` with `try!`, but this may change one day...
 macro_rules! t {
     ($e:expr) => (match $e {
         Ok(e) => e,