Junegunn Choi da1f645670 Change --preview-window delimiter from : to , for consistency ...

Delimiter : was chosen when --preview-option only supported position and
size attributes. e.g. up:50%

2021-04-06 20:10:55 +09:00

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man1

Change --preview-window delimiter from : to , for consistency

2021-04-06 20:10:55 +09:00