bug#10257: 23.3.1 Cygwin: network drives - file is write protected (false positive)

[Richard Stallman]

    I have a question about the emacs side of this.  I wonder what the 
    rationale is for testing writability before trying to save the file, and 
    then asking the user for confirmation in case the (unreliable) test for 
    writability fails (*).

I think the reason for the fallible first test is to avoid things that
are done (to backup files, for instance) before trying to write the
file.  It is good to avoid them if the write would fail anyway.

-- 
Dr Richard Stallman
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