Update charted to 0.4.8 and roll

packages/quiver/lib/src/core/hash.dart

Index: packages/quiver/lib/src/core/hash.dart
diff --git a/packages/quiver/lib/src/core/hash.dart b/packages/quiver/lib/src/core/hash.dart
index de5317cc1152e07deb3cddbc79ada4f440c41bd9..1c0ce80dab4962994b4ab87a60b64486e78842db 100644
--- a/packages/quiver/lib/src/core/hash.dart
+++ b/packages/quiver/lib/src/core/hash.dart
@@ -14,26 +14,18 @@
 
 part of quiver.core;
 
-/**
- * Generates a hash code for multiple [objects].
- */
+/// Generates a hash code for multiple [objects].
 int hashObjects(Iterable objects) =>
     _finish(objects.fold(0, (h, i) => _combine(h, i.hashCode)));
 
-/**
- * Generates a hash code for two objects.
- */
+/// Generates a hash code for two objects.
 int hash2(a, b) => _finish(_combine(_combine(0, a.hashCode), b.hashCode));
 
-/**
- * Generates a hash code for three objects.
- */
+/// Generates a hash code for three objects.
 int hash3(a, b, c) => _finish(
     _combine(_combine(_combine(0, a.hashCode), b.hashCode), c.hashCode));
 
-/**
- * Generates a hash code for four objects.
- */
+/// Generates a hash code for four objects.
 int hash4(a, b, c, d) => _finish(_combine(
     _combine(_combine(_combine(0, a.hashCode), b.hashCode), c.hashCode),
     d.hashCode));