Merge branch 'update-anarchy-viscosity-info' into 'master'

Add correct viscosity info to ANARCHY

See merge request !746

src/hydro/AnarchyPU/hydro_io.h

@@ -207,7 +207,7 @@ INLINE static void hydro_write_flavour(hid_t h_grpsph) {
   /* Nothing in this minimal model... */
   io_write_attribute_s(h_grpsph, "Thermal Conductivity Model", "No treatment");
   io_write_attribute_s(h_grpsph, "Viscosity Model",
-                       "Minimal treatment as in Monaghan (1992)");
+                       "Simplified version of Cullen & Denhen (2011)");
 
   /* Time integration properties */
   io_write_attribute_f(h_grpsph, "Maximal Delta u change over dt",