added credits to @gwidion

ramalho · ramalho · commit c6a1da488272 · 2021-04-08T14:34:06.000-03:00
diff --git a/25-class-metaprog/tinyenums/microenum.py b/25-class-metaprog/tinyenums/microenum.py
@@ -1,3 +1,6 @@
+# This is an implementation of an idea by João S. O. Bueno (@gwidion)
+# shared privately with me, with permission to use in Fluent Python 2e.
+
 """
 Testing ``AutoFillDict``::
 
diff --git a/25-class-metaprog/tinyenums/nanoenum.py b/25-class-metaprog/tinyenums/nanoenum.py
@@ -1,3 +1,6 @@
+# This is a simplification of an idea by João S. O. Bueno (@gwidion)
+# shared privately with me, with permission to use in Fluent Python 2e.
+
 """
 Testing ``KeyIsValueDict``::
 
