py3: open patch file in binary mode and convert eol manually Here we don't introduce a reader wrapper since it wouldn't be easy to make read(n) handle partial data and length correctly.

py3: wrap file object to write patch in native eol preserving byte-ness

py3: drop b'' from debug message "moving bookmarks"

py3: use r'' instead of sysstr('') to get around code transformer Fewer function calls should be better.

ui: remove any combinations of CR|LF from prompt response On Windows, we have to accept both CR+LF and LF. This patch simply makes any trailing CRs and LFs removed from a user input instead of doing stricter parsing, as an input must be a readable text.

sshpeer: check pipe validity before forwarding output from it After the previous fix, fileobjectproxy._observedcall() (called when win32.peekpipe() accesses .fileno) started exploding. With this fix, similar checks are needed inside debugwireproto(). Since that is hardcoded to not use os.devnull, IDK if those are worth fixing.

util: forward __bool__()/__nonzero__() on fileobjectproxy In trying to debug the Windows process hang in D2720, I changed the stderr pipe to the peer to be os.devnull instead. That caused sshpeer._cleanuppipes()[1] to explode, complaining NoneType has no __iter__ attribute, even though the previous line checked for None. [1] https://www.mercurial-scm.org/repo/hg/file/b434965f984e/mercurial/sshpeer.py#l133

py3: fix slicing of bisect label in templatefilters.shortbisect()