Ch.12 - typo "siuation"

[JunichiIto]

In ch.12 (Toward RSpec 3), a word "siuation" exists. It should be "situation".

“As noted, this is a semantic change intended to differentiate between a “truthy” value (that is, not nil or false) and a siuation where an actual value is true. The same logic applies to “falsey” values versus actual false.”