[Bug libfortran/83811] fortran 'e' format broken for single digit exponents

[jvdelisle at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83811

--- Comment #2 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
The change has nothing to do with internl units. So it is related to the write
float refctoring we did.