patch 8.2.2899: Appveyor script does not detect nmake failure Commit: https://github.com/vim/vim/commit/f89be8de14cc9055d12f7b0f2c270a5bc09fc86c Author: K.Takata <kentkt@csc.jp> Date: Sat May 29 12:42:47 2021 +0200 patch 8.2.2899: Appveyor script does not detect nmake failure Problem: Appveyor script does not detect nmake failure. Solution: Explicitly check for executable. (Ken Takata, closes https://github.com/vim/vim/issues/8281)