I had forgotten to repeat the testing After repeting testing:
The reason for the failure is my man script. When running the tests directly with /usr/bin/man the tests work. I had defined "MANROFFOPT" in the script, and MANWIDTH was already defined as an environmental variable. I had created my alias to catch the standard error to a temporary file, and to notice me, if it was not empty. #### with man as my script I define nroff as "... -rLL=90m" I tested again MANWIDTH=80m man test and it did not work. But with MANWIDTH=70m man test it did! MANROFFOPT='-rLL=70m' man test does not work.
