patchFix tail option problem in test

> The tail command on my system complains:
>
> 	tail: cannot open `8192' for reading: No such file or directory
>
> if there is any whitespace between the '-c' option and the byte count.
>
> Signed-off-by: A Large Angry SCM <Gitzilla@gmail.com>
> ---
>
>  t/t5302-pack-index.sh |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/t/t5302-pack-index.sh b/t/t5302-pack-index.sh
> index 232e5f1..b7870a8 100755
> --- a/t/t5302-pack-index.sh
> +++ b/t/t5302-pack-index.sh
> @@ -16,7 +16,7 @@ test_expect_success \
>           test-genrandom "$i" 8192 >>file_$i &&
>           git-update-index --add file_$i || return 1
>       done &&
> -     echo 101 >file_101 && tail -c 8192 file_100 >>file_101 &&
> +     echo 101 >file_101 && tail -c8192 file_100 >>file_101 &&
>       git-update-index --add file_101 &&
>       tree=`git-write-tree` &&
>       commit=`git-commit-tree $tree </dev/null` && {

> A Large Angry SCM <gitzilla@gmail.com> writes:
> 
>> The tail command on my system complains:
>>
>> 	tail: cannot open `8192' for reading: No such file or directory
>>
>> if there is any whitespace between the '-c' option and the byte count.
>>
>> Signed-off-by: A Large Angry SCM <Gitzilla@gmail.com>
>> ---
>>
>>  t/t5302-pack-index.sh |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/t/t5302-pack-index.sh b/t/t5302-pack-index.sh
>> index 232e5f1..b7870a8 100755
>> --- a/t/t5302-pack-index.sh
>> +++ b/t/t5302-pack-index.sh
>> @@ -16,7 +16,7 @@ test_expect_success \
>>           test-genrandom "$i" 8192 >>file_$i &&
>>           git-update-index --add file_$i || return 1
>>       done &&
>> -     echo 101 >file_101 && tail -c 8192 file_100 >>file_101 &&
>> +     echo 101 >file_101 && tail -c8192 file_100 >>file_101 &&
>>       git-update-index --add file_101 &&
>>       tree=`git-write-tree` &&
>>       commit=`git-commit-tree $tree </dev/null` && {
> 
> I do not like using tail to do a byte-oriented thing like this
> to begin with.  How about using the plain old trustworthy and
> portable program, "dd", instead?