[bugfix] rope_at
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				|  | @ -120,8 +120,8 @@ rope_at(struct pic_rope *x, size_t i) | |||
|     if (i < x->left->weight) { | ||||
|       x = x->left; | ||||
|     } else { | ||||
|       x = x->right; | ||||
|       i -= x->left->weight; | ||||
|       x = x->right; | ||||
|     } | ||||
|   } | ||||
|   return -1; | ||||
|  |  | |||
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	 Yuichi Nishiwaki
						Yuichi Nishiwaki