all: fix typos

Change-Id: I775eb4b33422a95f4255799d551c9962d7e181d3
Reviewed-on: https://go-review.googlesource.com/c/140318Reviewed-by: Robert Griesemer <gri@golang.org>

src/go/types/typexpr.go

@@ -562,7 +562,7 @@ func (check *Checker) interfaceType(ityp *Interface, iface *ast.InterfaceType, d
 			// its position, and because interface method
 			// signatures don't get a receiver via regular
 			// type-checking (there isn't a receiver in the
-			// the method's AST). Setting the correct receiver
+			// method's AST). Setting the correct receiver
 			// type is also important for ptrRecv() (see methodset.go).
 			//
 			// TODO(gri) Consider marking methods signatures

src/os/user/cgo_lookup_unix.go

@@ -94,9 +94,8 @@ func lookupUnixUid(uid int) (*User, error) {
 	defer buf.free()
 
 	err := retryWithBuffer(buf, func() syscall.Errno {
-		// mygetpwuid_r is a wrapper around getpwuid_r to
-		// to avoid using uid_t because C.uid_t(uid) for
-		// unknown reasons doesn't work on linux.
+		// mygetpwuid_r is a wrapper around getpwuid_r to avoid using uid_t
+		// because C.uid_t(uid) for unknown reasons doesn't work on linux.
 		return syscall.Errno(C.mygetpwuid_r(C.int(uid),
 			&pwd,
 			(*C.char)(buf.ptr),
@@ -175,9 +174,8 @@ func lookupUnixGid(gid int) (*Group, error) {
 	defer buf.free()
 
 	err := retryWithBuffer(buf, func() syscall.Errno {
-		// mygetgrgid_r is a wrapper around getgrgid_r to
-		// to avoid using gid_t because C.gid_t(gid) for
-		// unknown reasons doesn't work on linux.
+		// mygetgrgid_r is a wrapper around getgrgid_r to avoid using gid_t
+		// because C.gid_t(gid) for unknown reasons doesn't work on linux.
 		return syscall.Errno(C.mygetgrgid_r(C.int(gid),
 			&grp,
 			(*C.char)(buf.ptr),