[Vim-vms] underscores (_) cannot be mapped

[Samuel Ferencik]

Hi,

the underscore (_) is a typical map-leader (the LHS of mappings typically
starts with an _). However, for some reason it cannot be used in vim on vms.

Example:
:map _h :echo "hi"<CR>

In my gvim on Windows, when I create the mapping above, and then start
typing "_h", vim knows that "_" is the prefix of a mapping, so it does not
apply/type the "_" immediately. Instead, it cashes the keypress and displays
the "_" in the bottom-right corner. That means, vim is waiting for the next
key - if it is an "h", vim will apply the _h mapping; if it is an "o", vim
will type "_o" (since there is no mapping for _o).

However, this does not work on vms: the _ gets applied/typed immediately (it
is not cashed). Thus, typing _h does not apply the mapping, but performs the
"_" action and then the "h" action.

Sam

=======================
:version
VIM - Vi IMproved 7.2 (2008 Aug 9, compiled Jan 13 2009 12:38:00)
OpenVMS version - Alpha
Included patches: 1-79
Compiled by SYSTEM at ALPHA::alpha.polarhome.com
Huge version without GUI.  Features included (+) or not (-):
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Compiler: Compaq C V6.5-001 on OpenVMS Alpha V7.3
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