doc: fix regex function not mentioned in heading.

* txr.1: search-regst added to heading of section which
describes it.

1 files changed, 1 insertions, 1 deletions

diff --git a/txr.1 b/txr.1
index c7c9b8df..c0c2758d 100644
--- a/txr.1
+++ b/txr.1
@@ -31764,7 +31764,7 @@ the regular expression
   --> ("abracadabra" "adlib" "adobe")
 .cble
 
-.coNP Functions @ search-regex and @ range-regex
+.coNP Functions @, search-regex @ range-regex and @ search-regst
 .synb
 .mets (search-regex < string < regex >> [ start <> [ from-end ]])
 .mets (range-regex < string < regex >> [ start <> [ from-end ]])