patch 8.0.0249: CI failure when a submit is close to previous one

Problem:    When two submits happen quick after each other, the tests for the
            first one may error out.
Solution:   Use a git depth of 10 instead of 1. (Christian Brabandt)

patch 8.0.0248: vim_strcat() cannot handle overlapping arguments

Problem:    vim_strcat() cannot handle overlapping arguments.
Solution:   Use mch_memmove() instead of strcpy(). (Justin M Keyes,
            closes vim#1415)

patch 8.0.0247: need to type Ctrl-N twice to select a completion

Problem:    Under some circumstances, one needs to type Ctrl-N or Ctrl-P twice
            to have a menu entry selected. (Lifepillar)
Solution:   call ins_compl_free(). (Christian Brabandt, closes vim#1411)

patch 8.0.0246: compiler warnings for int to pointer conversion

Problem:    Compiler warnings for int to pointer conversion.
Solution:   Fix macro for mch_memmove(). (John Marriott)

patch 8.0.0245: zh_CN.cp936.po has a conversion error

Problem:    The generated zh_CN.cp936.po message file is not encoded properly.
Solution:   Instead of using zh_CN.po as input, use zh_CN.UTF-8.po.

patch 8.0.0244: making t_BE empty only has an effect before startup

Problem:    When the user sets t_BE empty after startup to disable bracketed
            paste, this has no direct effect.
Solution:   When t_BE is made empty write t_BD.  When t_BE is made non-empty
            write the new value.

patch 8.0.0243: tolower() does not work if the byte count changes

Problem:    When making a character lower case with tolower() changes the byte
            cound, it is not made lower case.
Solution:   Add strlow_save(). (Dominique Pelle, closes vim#1406)

patch 8.0.0242: no tests for user command completion

Problem:    Completion of user defined functions is not covered by tests.
Solution:   Add tests.  Also test various errors of user-defined commands.
            (Dominique Pelle, closes vim#1413)

patch 8.0.0241: fallback implementation of mch_memmove is unused

Problem:    Vim defines a mch_memmove() function but it doesn't work, thus is
            always unused.
Solution:   Remove the mch_memmove implementation. (suggested by Dominique
            Pelle)

patch 8.0.0240: failure with one build on CI

Problem:    The clang build on CI fails with one configuration.
Solution:   Redo a previous patch that was accidentally reverted.