Add test to confirm fnn_unsuffixed does not emit exponent notation
Add test to confirm fnn_unsuffixed does not emit exponent notation

graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust