doc: tiny spelling fix in stateful object section s/an/a

Quoting Duncan Roe:
  Tiny nit: suggest "by a unique" instead of "by an unique".
  "a" reads better to this native en-GB speaker at least.

Signed-off-by: Florian Westphal <fw@strlen.de>

diff --git a/doc/nft.txt b/doc/nft.txt
index a4333d9d55f31e8d2bee9d6978df8065616a9477..011095babe808b63bc48aa1c4cd065d7b1fdc760 100644 (file)
--- a/doc/nft.txt
+++ b/doc/nft.txt
@@ -692,7 +692,7 @@ STATEFUL OBJECTS
 *list counters* ['family']
 *list quotas* ['family']
 
-Stateful objects are attached to tables and are identified by an unique name.
+Stateful objects are attached to tables and are identified by a unique name.
 They group stateful information from rules, to reference them in rules the
 keywords "type name" are used e.g. "counter name".