Hi Mortimer,

mbcladwell@stihie.net 写道：
> Reading
> https://www.gnu.org/software/guile/manual/html_node/Miscellaneous-String-Operations.html
> I learn that string-replace-substring is found in (ice-9 
> string-fun),

You probably want guile-users@ or bug-guile@.  This is help-guiX@, 
for the package manager and distribution[0].

Kind regards,

T G-R

[0]: http://guix.gnu.org/