"\version outdated" makes little sense for internal files

[David Kastrup]

dak@lola:/usr/local/tmp/lilypond$ lilypond scheme-sandbox
GNU LilyPond 2.25.0 (running Guile 2.2)
Processing `/usr/local/share/lilypond/2.25.0/ly/scheme-sandbox.ly'
Parsing...
GNU Guile 2.2.7
Copyright (C) 1995-2019 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(#{ g217}#)> #{ - #}

<string>:1:3: error: syntax error, unexpected end of input, expecting \etc
 -
   
/usr/local/share/lilypond/2.25.0/ly/scheme-sandbox.ly:34:2: error: error in #{ 
... #}
#
 (cond-expand
scheme@(#{ g217}#)> 


Note: compilation failed and \version outdated, did you
update input syntax with convert-ly?

  
https://lilypond.org/doc/v2.25/Documentation/usage/updating-files-with-convert_002dly

fatal error: failed files: "scheme-sandbox"

-- 
David Kastrup