udpkey.1: Some more tweaks to the manpage.

The MAC tag length is actually optional, so show this in the
description.

diff --git a/udpkey.1 b/udpkey.1
index 272905f..eee03dc 100644 (file)
--- a/udpkey.1
+++ b/udpkey.1
@@ -207,7 +207,7 @@ The
 program uses the Catacomb keyring format to store its cryptographic
 keys: see
 .BR keyring (5)
-for the technical details.  Keys maybe generated and managed using the
+for the technical details.  Keys may be generated and managed using the
 .BR key (1)
 utility.
 .PP
@@ -262,8 +262,8 @@ The default is
 .B mac
 The message authentication code used to ensure the integrity of the
 ciphertext, in the form
-.IB name / tagbits \fR.
-The default is to use HMAC with the chosen hash function, and truncate
+.IB name\fR[ / tagbits \fR].
+The defaults are to use HMAC with the chosen hash function, and truncate
 the tag to half of its original length.
 .PP
 Key fragments must contain only plain binary data: you can generate one