Fix typos and grammatical errors (#4521)

README.md

@@ -2,7 +2,7 @@
   <a href="https://www.vim.org/scripts/script.php?script_id=5779">
     <img alt="Logo" src="https://alfs.chigua.cn/dianyou/data/platform/default/20220525/coc.png" height="240" />
   </a>
-  <p align="center">Make your Vim/Neovim as smart as VSCode</p>
+  <p align="center">Make your Vim/Neovim as smart as VS Code</p>
   <p align="center">
     <a href="LICENSE.md"><img alt="Software License" src="https://img.shields.io/badge/license-Anti%20996-brightgreen.svg?style=flat-square"></a>
     <a href="https://github.com/neoclide/coc.nvim/actions"><img alt="Actions" src="https://img.shields.io/github/actions/workflow/status/neoclide/coc.nvim/ci.yml?style=flat-square&branch=master"></a>
@@ -14,7 +14,7 @@
 
 ---
 
-<img alt="Gif" src="https://alfs.chigua.cn/dianyou/data/platform/default/20220801/2022-08-01%2002-14-03.2022-08-01%2002_15_16.gif" width="60%" />
+<img alt="Custom coc popup menu with snippet support" src="https://alfs.chigua.cn/dianyou/data/platform/default/20220801/2022-08-01%2002-14-03.2022-08-01%2002_15_16.gif" width="60%" />
 
 _Custom popup menu with snippet support_
 
@@ -38,7 +38,7 @@ curl -sL install-node.vercel.app/lts | bash
 For [vim-plug](https://github.com/junegunn/vim-plug) users:
 
 ```vim
-" Use release branch (recommend)
+" Use release branch (recommended)
 Plug 'neoclide/coc.nvim', {'branch': 'release'}
 
 " Or build from source code by using yarn: https://yarnpkg.com
@@ -51,15 +51,14 @@ Checkout [Install
 coc.nvim](https://github.com/neoclide/coc.nvim/wiki/Install-coc.nvim) for
 more info.
 
-You **have to** install coc extension or configure language servers for
+You **have to** install coc extensions or configure language servers for
 LSP support.
 
-Install extensions like:
+Install extensions like this:
 
     :CocInstall coc-json coc-tsserver
 
-Or configure language server in `coc-settings.json` opened by
-`:CocConfig`, like:
+Or you can configure a language server in your `coc-settings.json`(open it using `:CocConfig`) like this:
 
 ```json
 {
@@ -90,7 +89,7 @@ Configuration is required to make coc.nvim easier to work with, since it
 doesn't change your key-mappings or Vim options. This is done as much as
 possible to avoid conflict with your other plugins.
 
-**❗️Important**: Some Vim plugins could change key mappings. Please use
+**❗️Important**: Some Vim plugins can change your key mappings. Please use
 command like`:verbose imap <tab>` to make sure that your keymap has taken effect.
 
 ```vim

plugin/coc.vim

@@ -25,7 +25,7 @@ function! s:checkVersion() abort
     else
       if !has('nvim-0.5.0') && !has('patch-8.2.0750')
         echohl WarningMsg
-        echom "coc.nvim works best on vim >= 8.2.0750 and neovim >= 0.5.0, consider upgrade your vim."
+        echom "coc.nvim works best on vim >= 8.2.0750 and neovim >= 0.5.0, consider upgrading vim."
         echom "You can add this to your vimrc to avoid this message:"
         echom "    let g:coc_disable_startup_warning = 1"
         echom "Note that some features may behave incorrectly."