sed -i -E "s/еж([аиу][^а-я])/ёжик\1/g" *ru* grep -E "еж[аиу][^а-я]" *ru* Comment: [^а-я] includes all spaces and punctuation and also finish of string

void fpcrtl_halt(int num) {
    __coverity_panic__();
}

int fpcrtl_abs(int num) {
    return num >= 0 ? num : -num;
}