Corrected expected simplify_expr doxygen warning

Author: jezhiggins

scripts/expected_doxygen_warnings.txt

@@ -94,7 +94,7 @@ warning: Included by graph for 'irep.h' not generated, too many nodes (62), thre
 warning: Included by graph for 'message.h' not generated, too many nodes (115), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
 warning: Included by graph for 'namespace.h' not generated, too many nodes (111), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
 warning: Included by graph for 'prefix.h' not generated, too many nodes (86), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
-warning: Included by graph for 'simplify_expr.h' not generated, too many nodes (76), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
+warning: Included by graph for 'simplify_expr.h' not generated, too many nodes (74), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
 warning: Included by graph for 'std_code.h' not generated, too many nodes (78), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
 warning: Included by graph for 'std_expr.h' not generated, too many nodes (245), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
 warning: Included by graph for 'std_types.h' not generated, too many nodes (124), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.