Fix: title issues

Author: bnmnetp

pretext/GeneralIntro/SpecialWaystoExecutePythoninthisBook.ptx

@@ -53,7 +53,7 @@ print(2 + 3)
             In codelens you can see and control the step by step progress.
             Note that the red arrow always points to the next line of code that is going to be executed.
             The light green arrow points to the line that was just executed.</p>
-  <program xml:id="firstexample" interactive="codelens" language="python">
+  <program label="firstexample" interactive="codelens" language="python">
     <input>
           print("My first program adds two numbers, 2 and 3:")
           print(2 + 3)

pretext/Lists/listTypeConversionFunction.ptx

@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <section xml:id="lists_list-type-conversion-function">
-  <title><c>list</c> Type Conversion Function</title>
+  <title>List - Type Conversion Function</title>
   <p>Python has a built-in type conversion function called
             <c>list</c> that tries to turn whatever you give it
             into a list.  For example, try the following:</p>