Fix: add xml:ids to all chapters

Author: bnmnetp

pretext/ActiveCode/toctree.ptx

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-    <chapter xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
+    <chapter xml:id="activecode" xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
         <title>ActiveCode Languages</title>
         <xi:include href='./python.ptx' />
         <xi:include href='./audiotours.ptx' />

pretext/Assessments/toctree.ptx

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-    <chapter xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
+    <chapter xml:id="assessments" xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
         <title>Assessments</title>
         <xi:include href='./multiplechoice.ptx' />
         <xi:include href='./fitb.ptx' />

pretext/Assignments/toctree.ptx

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<chapter xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US" xml:id="working-with-assignments-chap">
+<chapter xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US"
+    xml:id="working-with-assignments-chap">
     <title>Working with Assignments</title>
     <xi:include href='./instructorAssignments.ptx' />
     <xi:include href='./assembleAssignment.ptx' />

pretext/Containers/toctree.ptx

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-    <chapter xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
+    <chapter xml:id="containers" xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
         <title>Containers</title>
         <xi:include href='./reveal.ptx' />
         <xi:include href='./tabbed.ptx' />

pretext/CustomCourses/toctree.ptx

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-    <chapter xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
+    <chapter xml:id="creating-a-course" xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
         <title>Creating a Course</title>
         <xi:include href='./intro.ptx' />
         <xi:include href='./createCourse.ptx' />

pretext/InstructorInterface/toctree.ptx

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-    <chapter xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
+    <chapter xml:id="monitoring" xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
         <title>Monitoring your Student's Learning</title>
         <xi:include href='./InstructorInterface.ptx' />
         <xi:include href='./viewStudentActivity.ptx' />

pretext/Misc/toctree.ptx

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-    <chapter xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
+    <chapter xml:id="other-directives" xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
         <title>Other Directives</title>
         <xi:include href='./polls.ptx' />
         <xi:include href='./spreadsheet.ptx' />

pretext/Registration/toctree.ptx

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-    <chapter xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
+    <chapter xml:id="managing-your-course" xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
         <title>Managing Your Course</title>
         <xi:include href='./inviteStudents.ptx' />
         <xi:include href='./privaterunestone.ptx' />

pretext/Video/toctree.ptx

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-    <chapter xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
+    <chapter xml:id="video" xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
         <title>Video</title>
         <xi:include href='./video.ptx' />
         <xi:include href='./youtube.ptx' />

pretext/Visualizers/toctree.ptx

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-    <chapter xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
+    <chapter xml:id="visualizers" xmlns:xi="http://www.w3.org/2001/XInclude" xml:lang="en-US">
         <title>Visualizers</title>
         <xi:include href='./codelens.ptx' />
         <xi:include href='./showeval.ptx' />