Make IntoIterator lifetime bounds of &BTreeMap match with &HashMap
Make IntoIterator lifetime bounds of &BTreeMap match with &HashMap

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