<commit_before>package main

import "fmt"

// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func() int {
}

func main() {
    f := fibonacci()
    for i := 0; i < 10; i++ {
        fmt.Println(f())
    }
}<commit_msg>Implement `fibonacci`.<commit_after>package main

import "fmt"

// fibonacci is a function that returns
// a function that returns an int.
func fibonacci() func() int {
	n, x, y := 0, 0, 1
	return func() int {
		if n == 0 {
			n++
		} else {
			x, y = y, x+y
		}
		return x
	}
}

func main() {
	f := fibonacci()
	for i := 0; i < 10; i++ {
		fmt.Println(f())
	}
}
{'fraction_non_alphanumeric': 0.16237942122186494, 'fraction_numerical': 0.01607717041800643, 'mean_word_length': 2.5804597701149423, 'pattern_counts': {'":': 0, '<': 5, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '2450160', 'n_tokens_mistral': 263, 'n_tokens_neox': 242, 'n_words': 83}