hgcommand.vim: requirements & doc self-install more consistent; cosmetics
Check for availability of builtin system().
Set 'compatible' while sourcing script.
File operation during doc self-install:
Escape spaces in ex-commands.
Use quotes in system calls.
Incremented revision number(s).
Size of patch is due to cosmetic cleanups:
Removal of spaces at line endings.
<SID>Prefix to functions when called.
adding a
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
adding b
pushing to ../a
abort: could not lock repository ../a: Permission denied