I/O library and testing

[FX Coudert]

Hi all,

I can read the following in libgfortran/io/write.c (around line 405):

   switch (ft)
     {
[...]
     case FMT_E:
     case FMT_D:
[...]
       if (ft = FMT_E)
         expchar = 'E';
       else
         expchar = 'D';
       break;

I can only assume that "if (ft = FMT_E)" should really be "if (ft == 
FMT_E)", but that raises two questions: why doesn't it issue a warning 
when building the libgfortran, and what is the extent of the testing for 
the I/O library (I'm having a close look at it these latter days, to fix 
a few PR).

While the first question is somewhat anecdotical, the answer to the 
second I'd r

Thanks,
FX