fixup! build: added `make coverage` to compute C and Lua code coverage

Test coverage results for Lua code were off-by-one line.

diff --git a/scripts/luacov_to_info.lua b/scripts/luacov_to_info.lua
index 13bf583d0ec5de5559fa8a2dcba3e6c3a59068ed..372f5c05fce3fa30e23a0152f3051e00bd537c62 100755 (executable)
--- a/scripts/luacov_to_info.lua
+++ b/scripts/luacov_to_info.lua
@@ -29,7 +29,7 @@ local function write_lcov_info(files)
                print('TN:')
                print(string.format('SF:%s', fname))
                for i, hits in pairs(finfo.coverage) do
-                       print(string.format('DA:%d,%d', i - 1, hits))
+                       print(string.format('DA:%d,%d', i, hits))
                        instrumented = instrumented + 1
                        if hits > 0 then
                                nonzero = nonzero + 1
@@ -53,4 +53,4 @@ for _, fname in ipairs(arg) do
 end
 
 -- Write results
-write_lcov_info(all_files)
\ No newline at end of file
+write_lcov_info(all_files)