Merge pull request #333 from CobaltCause/doc-insert-behavior

document behavior of insert methods

Author: xacrimon

src/lib.rs

@@ -480,6 +480,7 @@ impl<'a, K: 'a + Eq + Hash, V: 'a, S: BuildHasher + Clone> DashMap<K, V, S> {
     }
 
     /// Inserts a key and a value into the map. Returns the old value associated with the key if there was one.
+    /// Does not update the key if it was already present.
     ///
     /// **Locking behaviour:** May deadlock if called when holding any sort of reference into the map.
     ///

src/set.rs

@@ -193,6 +193,7 @@ impl<'a, K: 'a + Eq + Hash, S: BuildHasher + Clone> DashSet<K, S> {
     }
 
     /// Inserts a key into the set. Returns true if the key was not already in the set.
+    /// Does not update the key if it was already present.
     ///
     /// # Examples
     ///