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-rw-r--r--MANUAL.txt3
1 file changed, 2 insertions, 1 deletion
diff --git a/MANUAL.txt b/MANUAL.txt
index 10487a3..053bb5f 100644
--- a/MANUAL.txt
+++ b/MANUAL.txt
@@ -755,7 +755,8 @@ specification with one of these strings.
Executes the script using a built-in Lua interpreter. The script is
loaded once per execution of cgit, and may be called multiple times
during cgit's lifetime, making it a good choice for repeated filters
- such as the 'email filter'. It responds to three functions:
+ such as the 'email filter'. A cgit built with NO_LUA has no interpreter
+ and refuses a filter with this prefix. It responds to three functions:
'filter_open(argument1, argument2, argument3, ...)'::
This is called upon activation of the filter for a particular