Updated L2 and LInf metrics to match nan and inf.

tests/MetricL2.cpp

@@ -50,7 +50,7 @@ namespace Nektar
         // name if it exists: first field is variable name, second field is L2
         // error.
         m_regex = "^L 2 error\\s*(?:\\(variable "
-                  "(\\w+)\\))?\\s*:\\s*([+-]?\\d.+\\d|-?0).*";
+                  "(\\w+)\\))?\\s*:\\s*([+-]?\\d.+\\d|-?0|[+-]?nan|[+-]?inf).*";
 
         // Find the L2 error to match against.
         TiXmlElement *value = metric->FirstChildElement("value");

tests/MetricLInf.cpp

@@ -50,7 +50,7 @@ namespace Nektar
         // name if it exists: first field is variable name, second field is L2
         // error.
         m_regex = "^L inf\\w* error\\s*(?:\\(variable "
-                  "(\\w+)\\))?\\s*:\\s*([+-]?\\d.+\\d|-?0).*";
+                  "(\\w+)\\))?\\s*:\\s*([+-]?\\d.+\\d|-?0|[+-]?nan|[+-]?inf).*";
         
         // Find the L2 error to match against.
         TiXmlElement *value = metric->FirstChildElement("value");