fix: Add syntax highlighting to code blocks

vim/executing-vim-commands-from-terminal.md

@@ -1,6 +1,6 @@
 You can execute vim commands in terminal by prefixing your commands with `+` symbol:
 
-```
+```bash
 vim filename +/searchterm
 vim +PlugInstall
 vim filename +g/foo/d

vim/meaning-of-a-tilde-at-the-end-of-filename.md

@@ -1,5 +1,5 @@
 Typically files ending with a ~ are backups created by editors like emacs, nano or vi. Set `backupdir` to some other location if you don't want to see them everywhere.
 
-```
+```vim
 set backupdir=/path/to/somewhere
 ```

vim/searching-through-multiple-files-in-plain-vim.md

@@ -1,6 +1,6 @@
 You can search through multiple files using `vimgrep` command.
 
-```
+```vim
 # search for string all python files in the current dir
 :vimgrep string *.py
 # search for string all python files in the current dir and subdir of the current dir

vim/using-global-command.md

@@ -1,6 +1,6 @@
 The global command `:g[lobal]` is very powerful. It is used to execute a command matching a pattern. The syntax is 
 
-```
+```vim
 :[range]g/pattern/cmd
 ```