Merge pull request iggredible#133 from CyrusYip/patch-1

ch03: initialize vim-plug before loading plugins

ch03_searching_files.md

@@ -232,8 +232,10 @@ After installing fzf and ripgrep, let's set up the fzf plugin. I am using [vim-p
 Add these inside your `.vimrc` plugins. You need to use [fzf.vim](https://github.com/junegunn/fzf.vim) plugin (created by the same fzf author).
 
 ```
+call plug#begin()
 Plug 'junegunn/fzf.vim'
 Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
+call plug#end()
 ```
 
 After adding these lines, you will need to open `vim` and run `:PlugInstall`. It will install all plugins that are defined in your `vimrc` file and are not installed. In our case, it will install `fzf.vim` and `fzf`.