Recently I have seen a lot of people are using square brackets as string delimiters. That made me think most of the community isn;t aware of this fact.
When you use square brackets and there is #define/#include in scope those strings might end with something very different than you expected. ie:

#define error 1

? 'An error has occurred'
? [An error has occurred]

Bottomline: Use single or double quotes as string delimiters unless you know what you're doing with square brackets.
Cetin