Latest patchutils 0.4.5 adds a patchview-wrapper python script used by {git{diff,show},svndiff}view to run patchview alias symlink to filterdiff exe or directly.
Makefile.am suffixes patchview-wrapper script only with $(EXEEXT) but does not suffix the other scripts provided, causing not found errors as the patchview-wrapper script is not compiled to an executable suffixed with $(EXEEXT).
Treat patchview-wrapper like other shell and perl scripts by not appending $(EXEEXT) in Makefile.am.
patchutils-0.4.5-Makefile-am-patchview-wrapper-script-not-exe-drop-EXEEXT.patch