pkg syscall (windows-386), func FullPath(string) (string, error)
pkg syscall (windows-amd64), func FullPath(string) (string, error)

# CL 98150043 testing: add Coverage function, Russ Cox <******@****.***>
pkg testing, func Coverage() float64

# CL 148770043 cmd/go, testing: add TestMain support, Russ Cox <******@****.***>

			// Experiments (using IndexPeriodic) suggest
			// the cutover is about 16 byte skips.
			// TODO: if large prefixes of sep are matching
			// we should cutover at even larger average skips,
			// because Equal becomes that much more expensive.
			// This code does not take that effect into account.
			j := bytealg.IndexRabinKarp(s[i:], sep)
			if j < 0 {
				return -1
			}