Rebuild html.

docs/sphinx_docs/_build/html/notebooks/NoUpdates.html

@@ -17,7 +17,7 @@
     <link rel="index" title="Index" href="../genindex.html" />
     <link rel="search" title="Search" href="../search.html" />
     <link rel="next" title="Categorical Programming" href="Categorical.html" />
-    <link rel="prev" title="Quadratic formula" href="Quadratic.html" />
+    <link rel="prev" title="Traversing Datastructures with Zippers" href="Zipper.html" />
    
   <link rel="stylesheet" href="../_static/custom.css" type="text/css" />
   
@@ -67,7 +67,7 @@
 <ul>
   <li><a href="../index.html">Documentation overview</a><ul>
   <li><a href="index.html">Essays about Programming in Joy</a><ul>
-      <li>Previous: <a href="Quadratic.html" title="previous chapter">Quadratic formula</a></li>
+      <li>Previous: <a href="Zipper.html" title="previous chapter">Traversing Datastructures with Zippers</a></li>
       <li>Next: <a href="Categorical.html" title="next chapter">Categorical Programming</a></li>
   </ul></li>
   </ul></li>

docs/sphinx_docs/notebooks/Replacing.rst

@@ -2,6 +2,14 @@
 Replacing Functions in the Dictionary
 =====================================
 
+For now, there is no way to define new functions from within the Joy
+language. All functions (and the interpreter) all accept and return a
+dictionary parameter (in addition to the stack and expression) so that
+we can implement e.g. a function that adds new functions to the
+dictionary. However, there's no function that does that. Adding a new
+function to the dictionary is a meta-interpreter action, you have to do
+it in Python, not Joy.
+
 .. code:: ipython2
 
     from notebook_preamble import D, J, V