fix(lua): print multiple return values with =expr (#16933)

src/nvim/lua/vim.lua

@@ -689,4 +689,23 @@ vim._expand_pat_get_parts = function(lua_string)
   return parts, search_index
 end
 
+---Prints given arguments in human-readable format.
+---Example:
+---<pre>
+---  -- Print highlight group Normal and store it's contents in a variable.
+---  local hl_normal = vim.pretty_print(vim.api.nvim_get_hl_by_name("Normal", true))
+---</pre>
+---@see |vim.inspect()|
+---@return given arguments.
+function vim.pretty_print(...)
+  local objects = {}
+  for i = 1, select('#', ...) do
+    local v = select(i, ...)
+    table.insert(objects, vim.inspect(v))
+  end
+
+  print(table.concat(objects, '    '))
+  return ...
+end
+
 return module