- #replace "program main_name by subroutine user\_main (and the end clause as well)"
- sed 's/[[:space:]]*[pP][rR][oO][gG][rR][aA][mM][[:space:]]*\([a-zA-Z0-9\-\_]*\)/ subroutine user\_main /g' "${ARG}" > "${TMPFILE}"
+ #replace "program main_name by subroutine user_main (and the end clause as well)"
+ sed 's/^\([[:space:]]*\)\([eE][nN][dD] \)\{0,1\}[pP][rR][oO][gG][rR][aA][mM][^a-zA-Z0-9]*\([a-zA-Z0-9_]*\)/\1\2subroutine user_main /g' "${ARG}" >> "${TMPFILE}"