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-rw-r--r--include/ruby/internal/intern/signal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/internal/intern/signal.h b/include/ruby/internal/intern/signal.h
index e5b6d6c3d5..4773788651 100644
--- a/include/ruby/internal/intern/signal.h
+++ b/include/ruby/internal/intern/signal.h
@@ -97,7 +97,7 @@ RBIMPL_ATTR_NONNULL(())
* - Case #11: When signo and PID are both negative, the behaviour of this
* function depends on how `killpg(3)` works. On Linux, it seems such
* attempt is strictly prohibited and `Errno::EINVAL` is raised. But on
- * macOS, it seems it tries to to send the signal actually to the process
+ * macOS, it seems it tries to send the signal actually to the process
* group.
*
* @note Above description is in fact different from how `kill(2)` works.