[patch, libfortran] PR33253 namelist: reading back a string with apostrophe

[FX Coudert]

> In addition, this patch adjusts the conditions that allow extended  
> reads of namelists.  This now requires -std=legacy.  The reason is  
> that all these cases with non standard namelists such as extra data  
> or no delimiters end up conflicting.  The mechanism for handling  
> these is present, its a matter of choice when to allow what.

Short of a proper review, which I might do later this week, I want to  
note that as this requires users to turn change compiler options for  
their (broken) code, this should probably be noted in the release notes.

FX