doc: fix typo on example

Quotes have been forgotten in the dnp3.data example, which throws an
SC_ERR_INVALID_SIGNATURE(39) if used like in the example.

diff --git a/doc/userguide/rules/dnp3-keywords.rst b/doc/userguide/rules/dnp3-keywords.rst
index 88763306158ca06f774fbb0574c4a1cd39a09280..36f5afd69904ccd35f0f745b9bf3c5006cbfeb5f 100644 (file)
--- a/doc/userguide/rules/dnp3-keywords.rst
+++ b/doc/userguide/rules/dnp3-keywords.rst
@@ -146,4 +146,4 @@ Example
 
 ::
 
-  dnp3_data; content:|c3 06|;
+  dnp3_data; content:"|c3 06|";