test(examples): doc the private key conversion routine

sammyne · sammyne · commit f32e14b3db37 · 2019-03-15T18:29:06.000+08:00
diff --git a/example_test.go b/example_test.go
@@ -198,6 +198,8 @@ func Example_audits() {
 	// Audit key N(m/*): xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ29ESFjqJoCu1Rupje8YtGqsefD265TMg7usUDFdp6W1EGMcet8
 }
 
+// this example demonstrates the conversion from the extended private key to
+// to its corresponding secp256k1 private key
 func ExamplePrivateKey_ToECPrivate() {
 	xprv, _ := bip32.ParsePrivateKey("xprv9s21ZrQH143K3QTDL4LXw2F7HEK3wJUD2nW2nRk4stbPy6cq3jPPqjiChkVvvNKmPGJxWUtg6LnF5kejMRNNU3TGtRBeJgk33yuGBxrMPHi")
 

Original file line number	Diff line number	Diff line change
`@@ -198,6 +198,8 @@ func Example_audits() {`
`198`	`198`	`// Audit key N(m/*): xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ29ESFjqJoCu1Rupje8YtGqsefD265TMg7usUDFdp6W1EGMcet8`
`199`	`199`	`}`
`200`	`200`
	`201`	`+// this example demonstrates the conversion from the extended private key to`
	`202`	`+// to its corresponding secp256k1 private key`
`201`	`203`	`func ExamplePrivateKey_ToECPrivate() {`
`202`	`204`	`xprv, _ := bip32.ParsePrivateKey("xprv9s21ZrQH143K3QTDL4LXw2F7HEK3wJUD2nW2nRk4stbPy6cq3jPPqjiChkVvvNKmPGJxWUtg6LnF5kejMRNNU3TGtRBeJgk33yuGBxrMPHi")`
`203`	`205`