Thanks for the review, Igor!
New commit message, considering your suggestions:
=============================================================
    test: update lua-Harness to c4451fe
 
    This patch backports several small commits from lua-Harness suite:
    - follow ravi 1.0-beta4[1]
    - refactor with near[2]
    - follow LuaJIT[3]
    - fix when no debug[4]
    - check if luac exists[5]
    - https[6]
    - more assert[7]
 
    [1]: https://framagit.org/fperrad/lua-Harness/-/commit/9455281b
    [2]: https://framagit.org/fperrad/lua-Harness/-/commit/70404580
    [3]: https://framagit.org/fperrad/lua-Harness/-/commit/ac7671b6
    [4]: https://framagit.org/fperrad/lua-Harness/-/commit/4db7e539
    [5]: https://framagit.org/fperrad/lua-Harness/-/commit/97e9e4c1
    [6]: https://framagit.org/fperrad/lua-Harness/-/commit/673c7869
    [7]:  https://framagit.org/fperrad/lua-Harness/-/commit/b7b1a9a2
 
    Part of tarantool/tarantool#5970
    Part of tarantool/tarantool#4473
 
=============================================================
 
And here is the diff, which will add missing changes:
=============================================================
diff --git a/test/lua-Harness-tests/301-basic.t b/test/lua-Harness-tests/301-basic.t
index 4adbb55c..e4ed2c41 100755
--- a/test/lua-Harness-tests/301-basic.t
+++ b/test/lua-Harness-tests/301-basic.t
@@ -53,13 +53,15 @@ local lua = _retrieve_progname()
 plan'no_plan'
 do -- assert
-    local v, msg = assert('text', "assert string")
+    local v, msg, extra = assert('text', "assert string", 'extra')
     equals(v, 'text', "function assert")
     equals(msg, "assert string")
-    v, msg = assert({}, "assert table")
+    equals(extra, 'extra')
+    v, msg, extra = assert({}, "assert table", 'extra')
     equals(msg, "assert table")
+    equals(extra, 'extra')
-    error_matches(function () assert(false, "ASSERTION TEST") end,
+    error_matches(function () assert(false, "ASSERTION TEST", 'extra') end,
             "^[^:]+:%d+: ASSERTION TEST",
             "function assert(false, msg)")
@@ -73,7 +75,7 @@ do -- assert
     else
         error_matches(function () assert(false, 42) end,
                 "^[^:]+:%d+: 42",
-                "function assert(false, 42)")
+                "function assert(false, 42) --> invalid")
     end
     if has_error53 then
=============================================================
 
 
   
>Max,
>
>Thanks for the patch! Please consider the comments below.
>
>On 20.07.21, Maxim Kokryashkin wrote:
>> This patch backports several small commits from lua-Harness suite:
>> - follow ravi 1.0-beta4[1]
>> - refactor with near[2]
>> - follow LuaJIT[3]
>> - fix when no debug[4]
>> - check if luac exists[5]
>> - https[6]
>> - more assert[7]
>>
>> [1]:  https://framagit.org/fperrad/lua-Harness/-/commit/9455281b
>> [2]:  https://framagit.org/fperrad/lua-Harness/-/commit/70404580
>> [3]:  https://framagit.org/fperrad/lua-Harness/-/commit/ac7671b6
>> [4]:  https://framagit.org/fperrad/lua-Harness/-/commit/4db7e539
>> [5]:  https://framagit.org/fperrad/lua-Harness/-/commit/97e9e4c1
>> [6]:  https://framagit.org/fperrad/lua-Harness/-/commit/673c7869
>> [7]:  https://framagit.org/fperrad/lua-Harness/-/commit/b7b1a9a2
>
>The changes from the latter commit is missing.
>
>Furthermore, you've updated lua-Harness up to c4451fe, which is
>backported in scope of "[PATCH v2 01/10] test: port lua-Harness to
>Test.Assertion". Hence, the commit subject need to be updated too.
>
>>
>> Part of #5970
>> Part of #4473
>
>BTW, both issues are also mentioned the wrong way. The right format is
>tarantool/tarantool#<issue-number> for both cases (see the previous
>patches in the series for the examples).
>
>> ---
>> test/lua-Harness-tests/200-examples.t | 2 +-
>> test/lua-Harness-tests/203-lexico.t | 2 +-
>> test/lua-Harness-tests/241-standalone.t | 3 +-
>> test/lua-Harness-tests/242-luac.t | 4 +++
>> test/lua-Harness-tests/301-basic.t | 2 +-
>> test/lua-Harness-tests/304-string.t | 2 +-
>> test/lua-Harness-tests/307-math.t | 44 +++++++++++------------
>> test/lua-Harness-tests/310-debug.t | 2 --
>> test/lua-Harness-tests/320-stdin.t | 14 +++++---
>> test/lua-Harness-tests/401-bitop.t | 2 +-
>> test/lua-Harness-tests/402-ffi.t | 2 +-
>> test/lua-Harness-tests/403-jit.t | 2 +-
>> test/lua-Harness-tests/404-ext.t | 2 +-
>> test/lua-Harness-tests/411-luajit.t | 2 +-
>> test/lua-Harness-tests/profile_ravi.lua | 4 +--
>> test/lua-Harness-tests/test_assertion.lua | 9 +++++
>> 16 files changed, 57 insertions(+), 41 deletions(-)
>>
>
><snipped>
>
>> --
>> 2.32.0
>>
>
>--
>Best regards,
>IM