patch 8.0.0051

Problem:    New code for job_stop() breaks channel test on AppVeyor.
Solution:   Revert the change.

patch 8.0.0050

Problem:    An exiting job is detected with a large latency.
Solution:   Check for pending job more often. (Ozaki Kiichi)  Change the
            double loop in mch_inchar() into one.

patch 8.0.0049

Problem:    When a match ends in part of concealed text highlighting, it might
            mess up concealing by resetting prev_syntax_id.
Solution:   Do not reset prev_syntax_id and add a test to verify. (Christian
            Brabandt, closes vim#1092)

patch 8.0.0048

Problem:    On Windows job_stop() stops cmd.exe, not the processes it runs.
            (Linwei)
Solution:   Iterate over all processes and terminate the one where the parent
            is the job process. (Yasuhiro Matsumoto, closes vim#1184)

patch 8.0.0047

Problem:    Crash when using the preview window from an unnamed buffer.
            (lifepillar)
Solution:   Do not clear the wrong buffer. (closes vim#1200)

patch 8.0.0046

Problem:    Using NUL instead of NULL.
Solution:   Change to NULL. (Dominique Pelle)

patch 8.0.0045

Problem:    Calling job_stop() right after job_start() does not work.
Solution:   Block signals while fork is still busy. (Ozaki Kiichi, closes
            vim#1155)

patch 8.0.0044

Problem:    In diff mode the cursor may end up below the last line, resulting
            in an ml_get error.
Solution:   Check the line to be valid.

patch 8.0.0043

Problem:    When using Insert mode completion with 'completeopt' containing
            "noinsert" with CTRL-N the change is not saved for undo.  (Tommy
            Allen)
Solution:   Call stop_arrow() before inserting for any key.

patch 8.0.0042

Problem:    When using Insert mode completion with 'completeopt' containing
            "noinsert" change is not saved for undo.  (Tommy Allen)
Solution:   Call stop_arrow() before inserting for pressing Enter.