Issue #27895:  Spelling fixes (Contributed by Ville Skyttä).
diff --git a/Python/formatter_unicode.c b/Python/formatter_unicode.c
index 8e9c502..e7c6a4f 100644
--- a/Python/formatter_unicode.c
+++ b/Python/formatter_unicode.c
@@ -118,7 +118,7 @@
 } InternalFormatSpec;
 
 #if 0
-/* Occassionally useful for debugging. Should normally be commented out. */
+/* Occasionally useful for debugging. Should normally be commented out. */
 static void
 DEBUG_PRINT_FORMAT_SPEC(InternalFormatSpec *format)
 {