Improve Assets class code style
Improve Assets class code style

ccardinaux/grav-test,toovy/grav,toovy/grav,JamesPan/gravbox,sylvestrelucia/grav,Sommerregen/grav,joeyhenricks/a-broke-vegan,dimayakovlev/grav,tomzx/blog.tomrochette.com,sylvestrelucia/grav,userfrosting/learn,shortsofia/testesitegrav.github.io,Vivalldi/grav,joeyhenricks/a-broke-vegan,tomzx/blog.tomrochette.com,tomzx/blog.tomrochette.com,userfrosting/learn,sylvestrelucia/grav,sylvestrelucia/grav,getgrav/grav,userfrosting/learn,notklaatu/grav,userfrosting/learn,stell/grav,notklaatu/grav,JamesPan/gravbox,getgrav/grav,Vivalldi/grav,JamesPan/gravbox,tomzx/blog.tomrochette.com,JamesPan/gravbox,dimayakovlev/grav,gigago/grav,webuxr/iamrs