Fix Brusselator problem typos

Author: Steven-Roberts

toolbox/+otp/+brusselator/+presets/Canonical.m

@@ -4,7 +4,7 @@
 
     methods
         function obj = Canonical(varargin)
-            % Create the Canonical Brusselator problem object.
+            % Create the canonical Brusselator problem object.
             %
             % Parameters
             % ----------

toolbox/+otp/+brusselator/+presets/HairerNorsettWanner.m

@@ -4,7 +4,7 @@
 
     methods
         function obj = HairerNorsettWanner()
-            % Create the HairerNorsettWanner Brusselator problem object.
+            % Create the Hairer­–Norsett–Wanner Brusselator problem object.
 
             y0 = [1.5; 3];
             tspan = [0, 20];

toolbox/+otp/+brusselator/+presets/Spiral.m

@@ -4,7 +4,7 @@
 
     methods
         function obj = Spiral()
-            % Create the Spiral Brusselator problem object.
+            % Create the spiral Brusselator problem object.
 
             y0 = [1; 1];
             tspan = [0, 30];

toolbox/+otp/+brusselator/+presets/SteadyState.m

@@ -4,7 +4,7 @@
 
     methods
         function obj = SteadyState(varargin)
-            % Create the SteadyState Brusselator problem object.
+            % Create the steady state Brusselator problem object.
             %
             % Parameters
             % ----------