Add .write(true) to append and truncate examples
#26642
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Setting append without write doesn't give you a writeable file. Showing it as an example in the docs is confusing at best. Using truncate on a read-only file is an error on POSIX systems (note however that using create with read-only flags is fine).
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…crichton Setting append without write doesn't give you a writeable file. Showing it as an example in the docs is confusing at best ([reddit](https://www.reddit.com/r/rust/comments/3bbz8w/why_is_writing_a_file_not_working_for_me/)) Using truncate (O_TRUNC) on a read-only file is an error on POSIX systems ("unspecified"). Note however that using create (O_CREAT) with read-only flags is fine. Related: #26103 (which IMHO is wrong; saying "append is different than write" when should simply be "append needs write". My vote is to make append imply write)
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Hopefully this will reduce the kind of confusion @joelmccracken repots in http://joelmccracken.github.io/entries/a-simple-web-app-in-rust-pt-2b/
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Setting append without write doesn't give you a writeable file. Showing it as an example in the docs is confusing at best (reddit)
Using truncate (O_TRUNC) on a read-only file is an error on POSIX systems ("unspecified"). Note however that using create (O_CREAT) with read-only flags is fine.
Related: #26103 (which IMHO is wrong; saying "append is different than write" when should simply be "append needs write". My vote is to make append imply write)