updates

README.do.txt

@@ -43,7 +43,7 @@ For example, a pendulum and its body diagram,
 
 FIGURE: [examples/pendulum2, width=800 frac=1]
 
-can be created by the "`examples/pendulum.py`": "https://github.com/hplgit/pysketcher/tree/master/examples/pendulum.py".
+can be created by the program "`examples/pendulum.py`": "https://github.com/hplgit/pysketcher/tree/master/examples/pendulum.py".
 
 
 ===== Citation =====

README.md

@@ -48,7 +48,7 @@ For example, a pendulum and its body diagram,
 <!-- <img src="examples/pendulum2.png" width=800> -->
 ![](examples/pendulum2.png)
 
-can be created by the [`examples/pendulum.py`](https://github.com/hplgit/pysketcher/tree/master/examples/pendulum.py).
+can be created by the program [`examples/pendulum.py`](https://github.com/hplgit/pysketcher/tree/master/examples/pendulum.py).
 
 
 ### Citation