nothrow opAssign for Small Sting/Array

Author: 9il

source/mir/small_array.d

@@ -102,14 +102,14 @@ struct SmallArray(T, uint maxLength)
     }
 
     /// ditto
-    ref typeof(this) opAssign(ref SmallArray rhs) return
+    ref typeof(this) opAssign(ref SmallArray rhs) return nothrow
     {
         _data = rhs._data;
         return this;
     }
 
     /// ditto
-    ref typeof(this) opAssign(SmallArray rhs) return
+    ref typeof(this) opAssign(SmallArray rhs) return nothrow
     {
         _data = rhs._data;
         return this;

source/mir/small_string.d

@@ -111,14 +111,14 @@ extern(D):
     }
 
     /// ditto
-    ref typeof(this) opAssign(ref scope const SmallString rhs) return
+    ref typeof(this) opAssign(ref scope const SmallString rhs) return nothrow
     {
         _data = rhs._data;
         return this;
     }
 
     /// ditto
-    ref typeof(this) opAssign(SmallString rhs) return
+    ref typeof(this) opAssign(SmallString rhs) return nothrow
     {
         _data = rhs._data;
         return this;