Fix typos in descriptions

snippets/readFileLines.md

@@ -4,7 +4,7 @@ Returns an array of lines from the specified file.
 
 Use `readFileSync` function in `fs` node package to create a `Buffer` from a file.
 convert buffer to string using `toString(encoding)` function.
-creating an array from contents of file by `split`ing file content line by line(each `\n`).
+creating an array from contents of file by `split`ing file content line by line (each `\n`).
 
   ```js
 const fs = require('fs');