Fix typo.
diff --git a/Modules/gcmodule.c b/Modules/gcmodule.c
index bae2653..c0c091e 100644
--- a/Modules/gcmodule.c
+++ b/Modules/gcmodule.c
@@ -96,7 +96,7 @@
subtract_refs() then adjusts gc_refs so that it equals the number of
times an object is referenced directly from outside the generation
being collected.
- gc_refs reamins >= 0 throughout these steps.
+ gc_refs remains >= 0 throughout these steps.
GC_TENTATIVELY_UNREACHABLE
move_unreachable() then moves objects not reachable (whether directly or