updated for version 7.4.046
Problem:    Can't use Tcl 8.6.
Solution:   Change how Tcl_FindExecutable is called. (Jan Nijtmans)
Added tag v7-4-046 for changeset 68056d414f09
updated for version 7.4.047
Problem:    When using input() in a function invoked by a mapping it doesn't
	    work.
Solution:   Temporarily reset ex_normal_busy. (Yasuhiro Matsumoto)
Added tag v7-4-047 for changeset c21b2f52f1dd
updated for version 7.4.048
Problem:    Recent clang version complains about -fno-strength-reduce.
Solution:   Add a configure check for the clang version. (Kazunobu Kuriyama)
Added tag v7-4-048 for changeset 31c9acfeda8f
updated for version 7.4.049
Problem:    In Ex mode, when line numbers are enabled the substitute prompt is
	    wrong.
Solution:   Adjust for the line number size. (Benoit Pierre)
Added tag v7-4-049 for changeset 15c1b8a20da6
updated for version 7.4.050
Problem:    "gn" selects too much for the pattern "\d" when there are two
	    lines with a single digit. (Ryan Carney)
Solution:   Adjust the logic of is_one_char(). (Christian Brabandt)
Added tag v7-4-050 for changeset eb33cadafcab
Merge with master.
Auto version upgrade (7.4.050)