bug#17058: seq 8.20: wrong first delimiter character with defined separator

[Eugene Bright]

To whom it may concern.

I hava an issue with seq util.
First delimiter character is new line character in case of any separator.

For exapmle:
seq -s '|'  1 5
1
2|3|4|5|

Version information:
seq --version
seq (GNU coreutils) 8.20

seq version 5.97 produce expected result:
seq -s '|' 1 5
1|2|3|4|5

Regards,
Eugene Bright.