arg_make_syntax_err_help_msg() function

Prints the glossary in strict GNU format. Differences to arg_print_glossary() are: - wraps lines after 80 chars - indents lines without shortops - does not accept formatstrings Contributed by Uli Fouquet

Print a piece of text formatted, which means in a column with a left and a right margin. The lines are wrapped at whitspaces next to right margin. The function does not indent the first line, but only the following ones. See description of arg_print_formatted below.