footnote about sicp

Author: hjwp

chapter_22_outside_in.asciidoc

@@ -477,25 +477,31 @@ And then we can just work inside the `extra_content` block:
 ----
 ====
 
-We've made several design decisions in this template which are going
-to filter their way down through the code:
+We've made several design decisions in this template
+which are going to filter their way down through the code:
 
 <1> We want a variable called `owner` to represent the user in our template.
 
-<2> We want to be able to iterate through the lists created by the user using
-    `owner.list_set.all` (I happen to know we get this for free from the Django
-    ORM).
+<2> We want to be able to iterate through the lists created by the user
+    using `owner.list_set.all`
+    (I happen to know we get this for free from the Django ORM).
 
-<3> We want to use `list.name` to print out the "name" of the list, which is
-    currently specified as the text of its first element.
+<3> We want to use `list.name` to print out the "name" of the list,
+    which is currently specified as the text of its first element.
 
-NOTE: Outside-In TDD is sometimes called "programming by wishful thinking",
-    and you can see why.  We start writing code at the higher levels based on
-    what we wish we had at the lower levels, even though it doesn't exist yet!
+NOTE: Outside-In TDD is sometimes called "programming by wishful thinking",footnote:[
+    This phrase "programming by wishful thinking" was perhaps first used in
+    the amazing, mind-expanding textbook
+    https://en.wikipedia.org/wiki/Structure_and_Interpretation_of_Computer_Programs[SICP],
+    which I _cannot_ recommend highly enough.]
+    and you can see why.
+    We start writing code at the higher levels
+    based on what we wish we had at the lower levels,
+    even though it doesn't exist yet!
 
 
-We can rerun our FTs, to check that we didn't break anything, and to see whether
-we've got any further:
+We can rerun our FTs, to check that we didn't break anything,
+and to see whether we've got any further:
 
 
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