a bit more copy editing

Author: PythonCHB

source/exercises/mailroom/mailroom_with_dicts.rst

@@ -11,19 +11,18 @@ Use dicts where appropriate.
 
 The first version of this assignment used these basic data types: numbers, strings, lists and tuples.
 
-However, using dictionaries, an import built in data structure in Python, will let you re-write your program a bit more simply and efficiently.
+However, using dictionaries, an important built in data structure in Python, will let you re-write your program a bit more simply and efficiently.
 
 Update your mailroom program to:
 
-  - Convert your main donor data structure to be a dict. Think about an appropriate key for easy donations look up.
+  - Convert your main donor data structure to be a dict. Think about an appropriate key for easy donor look up.
 
-  - Use dicts where appropriate.
+  - Use dicts anywhere else, as appropriate.
 
   - Use a dict to switch between the users selections.
     see :ref:`dict_as_switch` for what this means.
 
-  - Try to use a dict and the ``.format()`` method to produce the letter as one
-    big template, rather than building up a big string that produces the letter in parts.
+  - Use a dict and the ``.format()`` method to produce the letter as one big template, rather than building up a big string that produces the letter in parts.
 
 
 Example: