Add doc comments to integer

integer/integer.go

@@ -1,17 +1,26 @@
+// Package integer provides utilities for working with integer data.
 package integer
 
-func UnsignedMin(width int) uint64 {
+// UnsignedMin returns the minimum value that an unsigned integer of the
+// specified width can represent.
+func UnsignedMin (width int) uint64 {
 	return 0
 }
 
-func UnsignedMax(width int) uint64 {
+// UnsignedMax returns the maximum value that an unsigned integer of the
+// specified width can represent.
+func UnsignedMax (width int) uint64 {
 	return (1 << width) - 1
 }
 
-func SignedMin(width int) int64 {
+// SignedMin returns the minimum value that a signed integer of the specified
+// width can represent.
+func SignedMin (width int) int64 {
 	return -1 - int64(UnsignedMax(width) / 2)
 }
 
-func SignedMax(width int) int64 {
+// SignedMax returns the maximum value that a signed integer of the specified
+// width can represent.
+func SignedMax (width int) int64 {
 	return int64(UnsignedMax(width) / 2)
 }