fix docs for state trackers

Author: geraintpalmer

docs/Guides/deadlock.rst

@@ -9,7 +9,6 @@ The diagram below shows an example, where the customer at the top node is blocke
 This circular blockage results is no more natural movement happening.
 
 .. image:: ../_static/2nodesindeadlock.svg
-   :scale: 100 %
    :alt: A 2 node queueing network in deadlock.
    :align: center
 

docs/Reference/state_trackers.rst

@@ -20,7 +20,7 @@ The SystemPopulation Tracker
 ----------------------------
 
 The SystemPopulation Tracker records the number of customers in the whole system, regardless of which node they are at.
-States take the form of a number:
+States take the form of a number::
 
     4
 
@@ -40,7 +40,7 @@ The NodePopulation Tracker
 The NodePopulation Tracker records the number of customers at each node.
 States take the form of list of numbers. An example for a three node queueing network is shown below::
 
-    [2, 0, 5]
+    (2, 0, 5)
 
 This denotes that there are two customers at the first node, no customers at the second node, and five customers at the third node.
 
@@ -58,9 +58,9 @@ The NodeClassMatrix Tracker
 The NodeClassPopulation Tracker records the number of customers at each node, split by customer class.
 States take the form of matrix, that is a list of lists, where the rows denote the nodes and the columns denote the customer classes. An example for a three node queueing network with two customer classes is shown below::
 
-    [[3, 0],
-     [0, 1],
-     [4, 1]]
+    ((3, 0),
+     (0, 1),
+     (4, 1))
 
 This denotes that there are:
   + Three customers at the first node - three of Class 0, and none of Class 1

docs/Tutorial-I/tutorial_iii.rst

@@ -72,7 +72,6 @@ The histogram of waits below was created using matplotlib, using the following c
     >>> plt.hist(waits); # doctest:+SKIP
 
 .. image:: ../_static/tutorial_iii_waitshist.svg
-   :scale: 100 %
    :alt: Histogram of waits for Tutorial III.
    :align: center