Docs: fix sort example

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 63fef7fc478d9a33051ddfee599bb0daf9691fa1..f7bebc866c9c8ba89126c0048ffcf3be9c7cd190 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -9736,7 +9736,7 @@ ${sort{3:2:1:4}{<}{$item}}
 .endd
 sorts a list of numbers, and
 .code
-${sort {$lookup dnsdb{>:,,mx=example.com}} {<} {${listextract{1}{<,$item}}}}
+${sort {${lookup dnsdb{>:,,mx=example.com}}} {<} {${listextract{1}{<,$item}}}}
 .endd
 will sort an MX lookup into priority order.