Add unit tests for aug_to_xml
Add unit tests for aug_to_xml

kumy/augeas,lutter/augeas,pevalme/augeas,lutter/augeas,mchf/augeas,hercules-team/augeas,domcleal/augeas,kumy/augeas,raphink/augeas,hercules-team/augeas,mlichvar/augeas,GeoffWilliams/augeas,MikaelSmith/augeas,hercules-team/augeas-do-not-use,manandbytes/augeas,MikaelSmith/augeas,pevalme/augeas,jjlin/augeas,dafugg/augeas,jasperla/augeas,manandbytes/augeas,dafugg/augeas,hercules-team/augeas-do-not-use,jjlin/augeas,jjlin/augeas,raphink/augeas,kumy/augeas,lutter/augeas,mlichvar/augeas,kunkku/augeas,kunkku/augeas,jtopjian/augeas,mchf/augeas,hercules-team/augeas-do-not-use,kumy/augeas,GeoffWilliams/augeas,ptoscano/augeas,jtopjian/augeas,kunkku/augeas,mlichvar/augeas,jasperla/augeas,ptoscano/augeas,ptoscano/augeas,dafugg/augeas,pevalme/augeas,domcleal/augeas,domcleal/augeas