[examples][1ptracer] modify .doc_config

examples/1ptracer/.doc_config

@@ -4,5 +4,19 @@
         "main.cc",
         "doc/problems.md",
         "doc/results.md"
+    ],
+
+    "doc/1pmodel.md" : [
+        "doc/1pintro.md",
+        "properties_1p.hh",
+        "problem_1p.hh",
+        "spatialparams_1p.hh"
+    ],
+
+    "doc/tracermodel.md" : [
+        "doc/tracerintro.md",
+        "properties_tracer.hh",
+        "problem_tracer.hh",
+        "spatialparams_tracer.hh"
     ]
 }

examples/1ptracer/doc/1pintro.md

+# CAPTION SINGLE_PHASE

examples/1ptracer/doc/tracerintro.md

+## CAPTION TRACER