the current environment. The former are kept in the directory aux-fixed. The
latter are distributed in the directory aux-var-src, and copied with the
standard substitutions into the directory aux-var at the start of each test
the current environment. The former are kept in the directory aux-fixed. The
latter are distributed in the directory aux-var-src, and copied with the
standard substitutions into the directory aux-var at the start of each test