[PATCH] Fix missing quote in sieve documentation example

---
 doc/texinfo/sieve.texi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/texinfo/sieve.texi b/doc/texinfo/sieve.texi
index bd71e6c29..e6ba18880 100644
--- a/doc/texinfo/sieve.texi
+++ b/doc/texinfo/sieve.texi
@@ -1768,7 +1768,7 @@ sides, the test is considered true if any pair is true.  For example,
 require ["relational", "fileinto"];
 
 if header :value "gt" :comparator "i;ascii-numeric"
-                ["x-spam-level] ["5"]
+                ["x-spam-level"] ["5"]
 @{
   fileinto "spam";
 @}
-- 
2.53.0