diff --git a/docs/tutorial.md b/docs/tutorial.md
index 4cf6f34..57aff44 100644
--- a/docs/tutorial.md
+++ b/docs/tutorial.md
@@ -257,9 +257,9 @@ se3 = SummarizedExperiment(
 
 ```python
 from biocutils import relaxed_combine_columns, combine_columns
-se_combined = combine_columns(se2, se1) 
+se_combined = combine_columns(se2, se1)
 
 se_relaxed_combine = relaxed_combine_columns(se1, se2, se3)
 ```
 
-Similarly one can perform `combine_rows` and `relaxed_combine_rows` operations. 
\ No newline at end of file
+Similarly one can perform `combine_rows` and `relaxed_combine_rows` operations.