chore: fix typos (#17670)

Co-authored-by: zeertzjq <zeertzjq@outlook.com>

runtime/lua/vim/keymap.lua

@@ -25,8 +25,8 @@ local keymap = {}
 ---    vim.keymap.set('n', 'asdf', require('jkl').my_fun)
 --- </pre>
 ---
---- the `require('jkl')` gets evaluated during this call in order to access the function. If you want to
---- avoid this cost at startup you can wrap it in a function, for example:
+--- the ``require('jkl')`` gets evaluated during this call in order to access the function.
+--- If you want to avoid this cost at startup you can wrap it in a function, for example:
 --- <pre>
 ---    vim.keymap.set('n', 'asdf', function() return require('jkl').my_fun() end)
 --- </pre>

runtime/lua/vim/lsp.lua

@@ -1689,7 +1689,7 @@ end
 ---
 --- Currently only supports a single client. This can be set via
 --- `setlocal formatexpr=v:lua.vim.lsp.formatexpr()` but will typically or in `on_attach`
---- via `vim.api.nvim_buf_set_option(bufnr, 'formatexpr', 'v:lua.vim.lsp.formatexpr(#{timeout_ms:250})')`.
+--- via ``vim.api.nvim_buf_set_option(bufnr, 'formatexpr', 'v:lua.vim.lsp.formatexpr(#{timeout_ms:250})')``.
 ---
 ---@param opts table options for customizing the formatting expression which takes the
 ---                   following optional keys:

runtime/lua/vim/shared.lua

@@ -331,7 +331,7 @@ end
 
 --- Add the reverse lookup values to an existing table.
 --- For example:
---- `tbl_add_reverse_lookup { A = 1 } == { [1] = 'A', A = 1 }`
+--- ``tbl_add_reverse_lookup { A = 1 } == { [1] = 'A', A = 1 }``
 --
 --Do note that it *modifies* the input.
 ---@param o table The table to add the reverse to.