[Matlab] Minor fixes to docs and screen output

Fix missing parameter docs in Matlab ReactorNet setTolerances. Fix missing semicolon in ThermoPhase display

interfaces/matlab/toolbox/@ReactorNet/setTolerances.m

@@ -1,6 +1,8 @@
 function setTolerances(r, rtol, atol)
 % SETTOLERANCES  Set the error tolerances.
 % setTolerances(r, rtol, atol)
+% :param r:
+%     Instance of class :mat:func:`ReactorNet`
 % :param rtol:
 %     Scalar relative error tolerance
 % :param atol:

interfaces/matlab/toolbox/@ThermoPhase/display.m

@@ -1,5 +1,5 @@
 function display(self, threshold)
 if nargin < 2
-    threshold = 1e-14
+    threshold = 1e-14;
 end
 phase_get(thermo_hndl(self), 15, 1, threshold);