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-rw-r--r--test/unit/formatc.lua2
1 files changed, 2 insertions, 0 deletions
diff --git a/test/unit/formatc.lua b/test/unit/formatc.lua
index 2fd37c599a..c94f0d88f7 100644
--- a/test/unit/formatc.lua
+++ b/test/unit/formatc.lua
@@ -154,6 +154,8 @@ local C_keywords = set { -- luacheck: ignore
--
-- The first one will have a lot of false positives (the line '{' for
-- example), the second one is more unique.
+--- @param string
+--- @return string
local function formatc(str)
local toks = TokeniseC(str)
local result = {}