vk_logmerge(1) on Linux
The text 5d4920cabd0e, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it. The page shows this text now.
a Valgrind XML log file merger
Flags it lists
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-f -
-h -
-o -
-t -
-v