In the man page
history-preserve-point
needs its default value listed:
history-preserve-point (Off)
P.S., let's say one just wants to turn it on for a couple of commands.
The man page's Readline Initialization section makes it seem that the
only chance of setting history-preserve-poi
Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i686'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-pc-linux-gnu'
-DCONF_VENDOR='pc' -DLOCALEDIR='/tmp/share/locale' -DPACKAGE='b