fixed sample for "SPACE"

[Oppodelldog]

the given sample \t\n\r does not work.
Corrected to align the token name.

[timtadh]

SPACE tokens are often defined as all the white space characters. However, since it was confusing for you I will accept the PR.

[Oppodelldog]

I guess the sample then should have been [ \t\n\r] to make the whitespaces optional.
I didn't know whitespaces are often called spaces.