It's often frustrating when using languages that rely on indentation,
particularly when copying and pasting your own chunks from place to place, as wierd spacing can invisibly wreak havoc on your sanity.
Some code editors let you see symbols in place of tabs and spaces.
This is nice, but visually crowds the workspace.
Since Sublime text automatically displays tabs and spaces, only when things are selected, doing a simple Control (or Apple) + A to select everything, and the clicking anywhere to deselect will help you spot these errors - only when you need em