Fix docs

Author: searls

docs/4-creating-test-doubles.md

@@ -96,7 +96,7 @@ behavior of tests when depended-on objects change.
 
 ### object(someObjectWithFunctions)
 
-Suppose you have an object with some functions as properties (and perhaps some non-function properties). If passed to `td.object()`, testdouble.js will do a deep copy of the object and then a shallow search-and-replace of any functions found on the object while and return it.
+Suppose you have an object with some functions as properties (and perhaps some non-function properties). If passed to `td.object()`, testdouble.js will do a deep copy of the object and replace of any functions found on the object while and return it.
 
 So, given:
 

docs/7-replacing-dependencies.md

@@ -18,8 +18,10 @@ instead
 In both cases, `td.replace` will grab the real dependency and imitate it with an
 appropriate fake:
 
-  * Plain functions are replaced with test double functions of the same name
-  * Plain objects are shallow-cloned and their top-level functions are replaced
+  * Plain functions are replaced with test double functions of the same name,
+    with all properties deep-cloned and any function properties replaced with
+    test double functions
+  * Plain objects are deep-cloned and all functions are replaced
     with test double functions
   * Constructor functions and ES classes with at least one prototypal function
     defined will be extended by an artificial constructor that will have all the