all: fix some comments

Change-Id: I7d5bfd4caac63820b26fc3408118c13e74e6448c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/464238
Run-TryBot: Ian Lance Taylor <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>
Reviewed-by: Tobias Klauser <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Run-TryBot: Tobias Klauser <[email protected]>
Reviewed-by: Michael Knyszek <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>

Author: cuishuang

plan9/mksyscall.go

@@ -55,7 +55,7 @@ func goBuildTags() string {
 	return strings.ReplaceAll(*tags, ",", " && ")
 }
 
-// plusBuildTags returns build tags in the +build format.
+// buildTags returns build tags in the +build format.
 func buildTags() string {
 	return *tags
 }

unix/syscall_unix.go

@@ -578,7 +578,7 @@ func Lutimes(path string, tv []Timeval) error {
 	return UtimesNanoAt(AT_FDCWD, path, ts, AT_SYMLINK_NOFOLLOW)
 }
 
-// emptyIovec reports whether there are no bytes in the slice of Iovec.
+// emptyIovecs reports whether there are no bytes in the slice of Iovec.
 func emptyIovecs(iov []Iovec) bool {
 	for i := range iov {
 		if iov[i].Len > 0 {

unix/timestruct.go

@@ -9,7 +9,7 @@ package unix
 
 import "time"
 
-// TimespecToNSec returns the time stored in ts as nanoseconds.
+// TimespecToNsec returns the time stored in ts as nanoseconds.
 func TimespecToNsec(ts Timespec) int64 { return ts.Nano() }
 
 // NsecToTimespec converts a number of nanoseconds into a Timespec.