encoding/binary: improve comment formatting consistency

Use 2 slashes, space, then tab. This is more consistent, and removes
inadvertent leading space.

Change-Id: I383770ed4eb8ac17c78c7ae5675b553d4fb70b1e
Reviewed-on: https://go-review.googlesource.com/46726Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/encoding/binary/varint.go

@@ -53,9 +53,9 @@ func PutUvarint(buf []byte, x uint64) int {
 // number of bytes read (> 0). If an error occurred, the value is 0
 // and the number of bytes n is <= 0 meaning:
 //
-//	n == 0: buf too small
-//	n  < 0: value larger than 64 bits (overflow)
-//              and -n is the number of bytes read
+// 	n == 0: buf too small
+// 	n  < 0: value larger than 64 bits (overflow)
+// 	        and -n is the number of bytes read
 //
 func Uvarint(buf []byte) (uint64, int) {
 	var x uint64
@@ -87,9 +87,9 @@ func PutVarint(buf []byte, x int64) int {
 // number of bytes read (> 0). If an error occurred, the value is 0
 // and the number of bytes n is <= 0 with the following meaning:
 //
-//	n == 0: buf too small
-//	n  < 0: value larger than 64 bits (overflow)
-//              and -n is the number of bytes read
+// 	n == 0: buf too small
+// 	n  < 0: value larger than 64 bits (overflow)
+// 	        and -n is the number of bytes read
 //
 func Varint(buf []byte) (int64, int) {
 	ux, n := Uvarint(buf) // ok to continue in presence of error