patch 8.0.1231: expanding file name drops dash

Problem:    Expanding file name drops dash. (stucki)
Solution:   Use the right position. (Christian Brabandt, closes vim#2184)

patch 8.0.1230: CTRL-A in Visual mode uses character after selection

Problem:    CTRL-A in Visual mode uses character after selection. (Nikolai
            Pavlov)
Solution:   Check the length before using a character.

patch 8.0.1229: condition in vim_str2nr() is always true

Problem:    Condition in vim_str2nr() is always true. (Nikolai Pavlov)
Solution:   Remove the condition. (Closes vim#2259)

patch 8.0.1228: invalid memory access in GUI test

Problem:    Invalid memory access in GUI test.
Solution:   Check that the row is not outside of the screen.

patch 8.0.1227: undefined left shift in readfile()

Problem:    Undefined left shift in readfile(). (Brian 'geeknik' Carpenter)
Solution:   Add cast to unsigned. (Dominique Pelle, closes vim#2253)

patch 8.0.1226: edit and popup tests failing

Problem:    Edit and popup tests failing.
Solution:   Make the tests pass.

patch 8.0.1225: no check for spell region being zero

Problem:    No check for spell region being zero. (geeknik)
Solution:   Check for zero. (closes vim#2252)

patch 8.0.1224: still interference between test functions

Problem:    Still interference between test functions.
Solution:   Clear autocommands. Wipe all buffers.  Fix tests that depend on a
            specific start context.

patch 8.0.1223: crash when using autocomplete and tab pages

Problem:    Crash when using autocomplete and tab pages.
Solution:   Check if the current tab changed. (Christian Brabandt, closes
            vim#2239)

patch 8.0.1222: test functions interfere with each other

Problem:    Test functions interfere with each other.
Solution:   Cleanup tab pages, windows and buffers.  Reset option.