updated for version 7.3.893
Problem:    Crash when using b:, w: or t: after closing the buffer, window or
	    tabpage.
Solution:   Allocate the dictionary instead of having it part of the
	    buffer/window/tabpage struct. (Yukihiro Nakadaira)
Added tag v7-3-893 for changeset dc3efb6d5a08
updated for version 7.3.894
Problem:    Using wrong RUBY_VER causing Ruby build to break.
Solution:   Correct the RUBY_VER value. (Yongwei Wu)
Added tag v7-3-894 for changeset 52e946d654e0
updated for version 7.3.895
Problem:    Valgrind error in test 91. (Issue 128)
Solution:   Pass scope name to find_var_in_ht().
Added tag v7-3-895 for changeset 11007e80829c