A legitimate user behavior is not handled in the sfind and rfind function when searching for tags.

[DragonPig42]

Steps to reproduce:

1. Enter sfind t/muslim halal family in the command box. Note that the keyword "halal" and "family" has double space in between.

2.Similar problem also happen to the rfind function when i tried to enter rfind t/worthtrip open with double spacing in between "worthtrip" and "open".

I think these should be a valid search input so shouldn't have the error messages, perhaps can make your program to ignore the extra spaces.