diff --git a/src/source.rs b/src/source.rs
index 029a00a9..37e5c6a4 100644
--- a/src/source.rs
+++ b/src/source.rs
@@ -12,7 +12,7 @@ use core::ops::{Deref, Range};
 /// Most notably this is implemented for `&str`. It is unlikely you will
 /// ever want to use this Trait yourself, unless implementing a new `Source`
 /// the `Lexer` can use.
-/// 
+///
 /// SAFETY: Unless the unsafe functions of this trait are disabled with the `forbid_unsafe`
 /// feature, the correctness of the unsafe functions of this trait depend on the correct
 /// implementation of the `len` and `find_boundary` functions so generated code does not request