grammar: remove unnecessary comma in compound predicate

diff --git a/docs/dnssec/modes-of-operation.rst b/docs/dnssec/modes-of-operation.rst
index 7419fed43727916311bf8e768dc2e1e90bdea713..9043a913812a7f0c45d000ff651824ab7ef50eab 100644 (file)
--- a/docs/dnssec/modes-of-operation.rst
+++ b/docs/dnssec/modes-of-operation.rst
@@ -182,7 +182,7 @@ Hybrid BIND-mode operation
 --------------------------
 
 PowerDNS can also operate based on 'BIND'-style zone & configuration
-files. This 'bindbackend' has full knowledge of DNSSEC, but has no
+files. This 'bindbackend' has full knowledge of DNSSEC but has no
 native way of storing keying material.
 
 However, since PowerDNS supports operation with multiple simultaneous