docs: tweak example config comment spacing for clarity

Author: zuqini

README.md

@@ -159,8 +159,8 @@ For more examples, refer to example config:
 ```lua
 return {
   'nvim-mini/mini.bracketed',
-  -- If `opts` or `config = true` is set,
-  -- the config hook calls `require(MAIN).setup(opts)` by default.
+  -- If `opts` or `config = true` is set, the config hook calls
+  --    `require(MAIN).setup(opts)` by default.
   opts = {}, -- calls `require('mini.bracketed').setup({})`
 }
 ```

doc/zpack.txt

@@ -277,8 +277,8 @@ For more examples, refer to example config:
 >lua
     return {
       'nvim-mini/mini.bracketed',
-      -- If `opts` or `config = true` is set,
-      -- the config hook calls `require(MAIN).setup(opts)` by default.
+      -- If `opts` or `config = true` is set, the config hook calls
+      --    `require(MAIN).setup(opts)` by default.
       opts = {}, -- calls `require('mini.bracketed').setup({})`
     }
 <