change default strftime format for better portability
On some systems, such as Solaris and HP-UX, "%c" format
give output without the leading zero on the single-digit
month-day.
adding fooadding bombadding a.cadding dir/a.oadding dir/b.o! a.c! dir/a.o! dir/b.o? .hgignorea.c: unsupported file type (type is fifo)! a.c