After looking at trim.c, I searched for all trailing blanks in gnulib and found plenty:
$ g grep -l '[ ]$' build-aux/gendocs.sh build-aux/texinfo.tex config/srclist-update doc/COPYING.LESSERv2 doc/COPYING.LESSERv3 doc/Copyright/assign.future.manual doc/Copyright/assign.manual doc/Copyright/request-assign.changes doc/Makefile doc/error.texi doc/gendocs_template doc/gendocs_template_min doc/gnulib.texi doc/gpl-2.0.texi doc/lgpl-2.1.texi doc/maintain.texi doc/posix-functions/chown.texi doc/regexprops-generic.texi doc/relocatable-maint.texi doc/standards.texi lib/argp-help.c lib/argp-parse.c lib/argz.c lib/git-merge-changelog.c lib/javacomp.h lib/round.c lib/trim.c m4/argz.m4 m4/ldd.m4 modules/unilbrk/u16-possible-linebreaks modules/unilbrk/u32-possible-linebreaks modules/unilbrk/u8-possible-linebreaks tests/test-argp-2.sh tests/test-round2.c tests/unictype/test-categ_and.c tests/unictype/test-categ_and_not.c top/maint.mk users.txt If anyone objects to my removing all of them, speak now...
