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(viper)Multiple Files in Viper

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Multiple Files in Viper
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   Viper can edit multiple files.  This means, for example that you
never need to suffer through `No write since last change' errors.  Some
Viper elements are common over all the files.

`Textmarkers'
     Textmarkers remember _files and positions_.  If you set marker `a'
     in file `foo', start editing file `bar' and type `'a', then _YOU
     WILL SWITCH TO FILE `foo'_.  You can see the contents of a
     textmarker using the Viper command `[<a-z>' where <a-z> are the
     textmarkers, e.g., `[a' to view marker `a' .

`Repeated Commands'
     Command repetitions are common over files.  Typing `!!' will
     repeat the last `!' command whichever file it was issued from.
     Typing `.' will repeat the last command from any file, and
     searches will repeat the last search.  Ex commands can be repeated
     by typing `: <RET>'.  Note: in some rare cases, that `: <RET>' may
     do something dangerous.  However, usually its effect can be undone
     by typing `u'.

`Registers'
     Registers are common to files.  Also, text yanked with `y' can be
     put back (`p') into any file.  The Viper command `]<a-z>', where
     <a-z> are the registers, can be used to look at the contents of a
     register, e.g., type `]a' to view register `a'.

     There is one difference in text deletion that you should be aware
     of.  This difference comes from Emacs and was adopted in Viper
     because we find it very useful.  In Vi, if you delete a line, say,
     and then another line, these two deletions are separated and are
     put back separately if you use the `p' command.  In Emacs (and
     Viper), successive series of deletions that are _not interrupted_
     by other commands are lumped together, so the deleted text gets
     accumulated and can be put back as one chunk.  If you want to
     break a sequence of deletions so that the newly deleted text could
     be put back separately from the previously deleted text, you
     should perform a non-deleting action, e.g., move the cursor one
     character in any direction.

`Absolute Filenames'
     The current directory name for a file is automatically prepended
     to the file name in any `:e', `:r', `:w', etc., command (in Emacs,
     each buffer has a current directory).  This directory is inserted
     in the Minibuffer once you type space after `:e, r', etc.  Viper
     also supports completion of file names and Ex commands (<TAB>),
     and it keeps track of command and file history (`M-p', `M-n').
     Absolute filenames are required less often in Viper.

     You should be aware that Emacs interprets `/foo/bar//bla' as
     `/bla' and `/foo/~/bar' as `~/bar'.  This is designed to minimize
     the need for erasing file names that Emacs suggests in its
     prompts, if a suggested file name is not what you wanted.

     The command `:cd' will change the default directory for the
     current Emacs buffer.  The Ex command `:e' will interpret the
     filename argument in `csh', by default.  Note: Customization, if
     you want to change this.

Currently undisplayed files can be listed using the `:ar' command.  The
command `:n' can be given counts from the `:ar' list to switch to other
files.