Fixed a grammatical error in a message, and repointed a call to pretty.truncate_string().
Fixed a grammatical error in a message, and repointed a call to pretty.truncate_string().

ucrcsedept/galah-interact-python,galah-group/galah-interact-python,galah-group/galah-interact-python,ucrcsedept/galah-interact-python,ucrcsedept/galah-interact-python,galah-group/galah-interact-python