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-rw-r--r--src/hash.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/hash.c b/src/hash.c
index 6976530e1..8de7b55c8 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -894,7 +894,7 @@ inspect_hash(mrb_state *mrb, mrb_value hash, int recur)
ai = mrb_gc_arena_save(mrb);
- if (RSTRING_LEN(str) > 1) mrb_str_cat2(mrb, str, ", ");
+ if (RSTRING_LEN(str) > 1) mrb_str_cat(mrb, str, ", ", 2);
str2 = mrb_inspect(mrb, kh_key(h,k));
mrb_str_append(mrb, str, str2);