Fix typo in comment
diff --git a/src/tty/mod.rs b/src/tty/mod.rs
index b6f10af..91230c3 100644
--- a/src/tty/mod.rs
+++ b/src/tty/mod.rs
@@ -65,7 +65,7 @@
     fn sigwinch(&self) -> bool;
     /// Update the number of columns/rows in the current terminal.
     fn update_size(&mut self);
-    /// Get the number of rows in the current terminal.
+    /// Get the number of columns in the current terminal.
     fn get_columns(&self) -> usize;
     /// Get the number of rows in the current terminal.
     fn get_rows(&self) -> usize;