[hackers] [scroll] add comment for jumpdown || Jan Klemkow

[git]

commit 8bcfdd94e2c7e29fe4db0de4e6d073c61d647179
Author:     Jan Klemkow <j.klem...@wemelug.de>
AuthorDate: Sun Apr 12 23:36:42 2020 +0200
Commit:     Jan Klemkow <j.klem...@wemelug.de>
CommitDate: Sun Apr 12 23:36:42 2020 +0200

    add comment for jumpdown

diff --git a/scroll.c b/scroll.c
index 2c28b31..4a82bde 100644
--- a/scroll.c
+++ b/scroll.c
@@ -360,6 +360,7 @@ jumpdown(char *buf, size_t size)
 {
        int rows = ws.ws_row;
 
+       /* wind back by one page starting from the latest line */
        bottom = TAILQ_FIRST(&head);
        for (; TAILQ_NEXT(bottom, entries) != NULL && rows > 0; rows--)
                bottom = TAILQ_NEXT(bottom, entries);