manual page tools need updating.

The current ones in the CI are not escaping leading periods when they should.

The ones I have installed locally do.

diff --git a/doc/man/dnssec-importkey.1in b/doc/man/dnssec-importkey.1in
index 619e5edadea..174c25c2a3a 100644
--- a/doc/man/dnssec-importkey.1in
+++ b/doc/man/dnssec-importkey.1in
@@ -39,7 +39,7 @@ level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
 .sp
 \fBdnssec\-importkey\fP reads a public DNSKEY record and generates a pair
 of .key/.private files. The DNSKEY record may be read from an existing
-.key file, in which case a corresponding .private file is
+\&.key file, in which case a corresponding .private file is
 generated, or it may be read from any other file or from the standard
 input, in which case both .key and .private files are generated.
 .sp