Re: [PATCH] trailer: change strbuf in-place in unfold_value()

> 
>> diff --git a/trailer.c b/trailer.c
>> index 470f86a4a2..b89fa12fe7 100644
>> --- a/trailer.c
>> +++ b/trailer.c
>> @@ -988,29 +988,25 @@ static int ends_with_blank_line(const char *buf, size_t len)
>>  
>>  static void unfold_value(struct strbuf *val)
>>  {
>> -	struct strbuf out = STRBUF_INIT;
>>  	size_t i;
>> +	size_t pos = 0;
>>  
>> -	strbuf_grow(&out, val->len);
>>  	i = 0;
>>  	while (i < val->len) {
>>  		char c = val->buf[i++];
>>  		if (c == '\n') {
>>  			/* Collapse continuation down to a single space. */
>>  			while (i < val->len && isspace(val->buf[i]))
>>  				i++;
>> -			strbuf_addch(&out, ' ');
>> -		} else {
>> -			strbuf_addch(&out, c);
>> +			val->buf[pos++] = ' ';
>> +		} else if (pos != i) {
> 
> Hmm, isn't 'pos' strictly (always) less than 'i' here? (note the post update
> of 'i' when setting 'c' at the head of the loop).