[PATCH] docs: fix typo in rust/kernel/str.rs

[Jihed Chaibi <jihed.chaibi.dev@gmail.com>]

Fixing a minor grammar error ("then" to "than") in rust/kernel/str.rs

Signed-off-by: Jihed Chaibi <jihed.chaibi.dev@gmail.com>

---
 rust/kernel/str.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs
index fb61ce81e..42f355f74 100644
--- a/rust/kernel/str.rs
+++ b/rust/kernel/str.rs
@@ -752,7 +752,7 @@ pub(crate) unsafe fn from_ptrs(pos: *mut u8, end: *mut u8) -> Self {
     /// for the lifetime of the returned [`RawFormatter`].
     pub(crate) unsafe fn from_buffer(buf: *mut u8, len: usize) -> Self {
         let pos = buf as usize;
-        // INVARIANT: We ensure that `end` is never less then `buf`, and the safety requirements
+        // INVARIANT: We ensure that `end` is never less than `buf`, and the safety requirements
         // guarantees that the memory region is valid for writes.
         Self {
             pos,
-- 
2.39.5