build: enable lintlua for test/unit/ dir #26396

Problem:
Not all Lua code is checked by stylua. Automating code-style is an
important mechanism for reducing time spent on accidental
(non-essential) complexity.

Solution:
- Enable lintlua for `test/unit/` directory.
- TODO: only `test/functional/` remains unchecked.

previous: 45fe4d11ad
previous: 517f0cc634

test/client/msgpack_rpc_stream.lua

@@ -3,13 +3,19 @@ local mpack = require('mpack')
 -- temporary hack to be able to manipulate buffer/window/tabpage
 local Buffer = {}
 Buffer.__index = Buffer
-function Buffer.new(id) return setmetatable({id=id}, Buffer) end
+function Buffer.new(id)
+  return setmetatable({ id = id }, Buffer)
+end
 local Window = {}
 Window.__index = Window
-function Window.new(id) return setmetatable({id=id}, Window) end
+function Window.new(id)
+  return setmetatable({ id = id }, Window)
+end
 local Tabpage = {}
 Tabpage.__index = Tabpage
-function Tabpage.new(id) return setmetatable({id=id}, Tabpage) end
+function Tabpage.new(id)
+  return setmetatable({ id = id }, Tabpage)
+end
 
 local Response = {}
 Response.__index = Response
@@ -17,7 +23,7 @@ Response.__index = Response
 function Response.new(msgpack_rpc_stream, request_id)
   return setmetatable({
     _msgpack_rpc_stream = msgpack_rpc_stream,
-    _request_id = request_id
+    _request_id = request_id,
   }, Response)
 end
 
@@ -41,19 +47,31 @@ function MsgpackRpcStream.new(stream)
     _stream = stream,
     _pack = mpack.Packer({
       ext = {
-        [Buffer] = function(o) return 0, mpack.encode(o.id) end,
-        [Window] = function(o) return 1, mpack.encode(o.id) end,
-        [Tabpage] = function(o) return 2, mpack.encode(o.id) end
-      }
+        [Buffer] = function(o)
+          return 0, mpack.encode(o.id)
+        end,
+        [Window] = function(o)
+          return 1, mpack.encode(o.id)
+        end,
+        [Tabpage] = function(o)
+          return 2, mpack.encode(o.id)
+        end,
+      },
     }),
     _session = mpack.Session({
       unpack = mpack.Unpacker({
         ext = {
-          [0] = function(_c, s) return Buffer.new(mpack.decode(s)) end,
-          [1] = function(_c, s) return Window.new(mpack.decode(s)) end,
-          [2] = function(_c, s) return Tabpage.new(mpack.decode(s)) end
-        }
-      })
+          [0] = function(_c, s)
+            return Buffer.new(mpack.decode(s))
+          end,
+          [1] = function(_c, s)
+            return Window.new(mpack.decode(s))
+          end,
+          [2] = function(_c, s)
+            return Tabpage.new(mpack.decode(s))
+          end,
+        },
+      }),
     }),
   }, MsgpackRpcStream)
 end
@@ -67,7 +85,7 @@ function MsgpackRpcStream:write(method, args, response_cb)
     data = self._session:notify()
   end
 
-  data = data ..  self._pack(method) ..  self._pack(args)
+  data = data .. self._pack(method) .. self._pack(args)
   self._stream:write(data)
 end
 
@@ -80,12 +98,10 @@ function MsgpackRpcStream:read_start(request_cb, notification_cb, eof_cb)
     local pos = 1
     local len = #data
     while pos <= len do
-      type, id_or_cb, method_or_error, args_or_result, pos =
-        self._session:receive(data, pos)
+      type, id_or_cb, method_or_error, args_or_result, pos = self._session:receive(data, pos)
       if type == 'request' or type == 'notification' then
         if type == 'request' then
-          request_cb(method_or_error, args_or_result, Response.new(self,
-                                                                   id_or_cb))
+          request_cb(method_or_error, args_or_result, Response.new(self, id_or_cb))
         else
           notification_cb(method_or_error, args_or_result)
         end