cargo fmt the file

Author: Sagebati

src/group_map.rs

@@ -3,14 +3,16 @@
 use std::collections::HashMap;
 use std::hash::Hash;
 use std::iter::Iterator;
+use alloc::Vec;
 
 /// Return a `HashMap` of keys mapped to a list of their corresponding values.
 ///
 /// See [`.into_group_map()`](../trait.Itertools.html#method.into_group_map)
 /// for more information.
 pub fn into_group_map<I, K, V>(iter: I) -> HashMap<K, Vec<V>>
-    where I: Iterator<Item=(K, V)>,
-          K: Hash + Eq,
+where
+    I: Iterator<Item = (K, V)>,
+    K: Hash + Eq,
 {
     let mut lookup = HashMap::new();
 
@@ -22,8 +24,9 @@ pub fn into_group_map<I, K, V>(iter: I) -> HashMap<K, Vec<V>>
 }
 
 pub fn into_group_map_by<I, K, V>(iter: I, f: impl Fn(&V) -> K) -> HashMap<K, Vec<V>>
-    where I: Iterator<Item=V>,
-          K: Hash + Eq,
+where
+    I: Iterator<Item = V>,
+    K: Hash + Eq,
 {
     let mut lookup = HashMap::new();
 
@@ -35,15 +38,16 @@ pub fn into_group_map_by<I, K, V>(iter: I, f: impl Fn(&V) -> K) -> HashMap<K, Ve
     lookup
 }
 
-pub fn into_group_map_by_fold<I, K, V, Acc, Fold>(iter: I, f_key: impl Fn(&V) -> K,
-                                             init: Acc,
-                                             fold: Fold) -> HashMap<K, Acc>
-    where I: Iterator<Item=V>,
-          K: Hash + Eq,
-          Acc: Clone,
-          Fold : FnMut(Acc,V) -> Acc + Clone
-
-
+pub fn into_group_map_by_fold<I, K, V, Acc, Fold>(
+    iter: impl Iterator<Item=V>,
+    f_key: impl Fn(&V) -> K,
+    init: Acc,
+    fold: Fold,
+) -> HashMap<K, Acc>
+where
+    K: Hash + Eq,
+    Acc: Clone,
+    Fold: FnMut(Acc, V) -> Acc + Clone,
 {
     let mut lookup = HashMap::new();
 
@@ -54,7 +58,6 @@ pub fn into_group_map_by_fold<I, K, V, Acc, Fold>(iter: I, f_key: impl Fn(&V) ->
 
     lookup
         .into_iter()
-        .map(move |(key,value)| (key, value.into_iter().fold(init.clone(), fold.clone())))
+        .map(move |(key, value)| (key, value.into_iter().fold(init.clone(), fold.clone())))
         .collect()
 }
-