Fixed spelling / typos (from PowerDNS:codespell)
diff --git a/tests/suites/test_suite_mpi.data b/tests/suites/test_suite_mpi.data
index dfc6b16..924f364 100644
--- a/tests/suites/test_suite_mpi.data
+++ b/tests/suites/test_suite_mpi.data
@@ -277,7 +277,7 @@
Base test mpi_sub_mpi #3 (Test with negative base)
mpi_sub_mpi:10:"-5":10:"7":10:"-12"
-Base test mpi_sub_mpi #4 (Test with negative substraction)
+Base test mpi_sub_mpi #4 (Test with negative subtraction)
mpi_sub_mpi:10:"5":10:"-7":10:"12"
Test mpi_sub_mpi #1