Be more explicit about preferences syntax by providing an example

diff --git a/index.mdwn b/index.mdwn
index 39bf5a92ff45a99d282a2afc373a7edbc738c4b0..944d459c4d8637ef556a5c0341c002861a11d58b 100644 (file)
--- a/index.mdwn
+++ b/index.mdwn
@@ -152,7 +152,11 @@ Using a non-default OpenPGP key
 If you want to use a different key other than your default for a given
 keyringer, use
 
-    keyringer <keyring> preferences add KEYID=FINGERPRINT
+    keyringer <keyring> preferences add KEYID=<fingerprint>
+
+Example:
+
+    keyringer <keyring> preferences add KEYID=0123456789ABCDEF0123456789ABCDE012345678
 
 Notes
 -----