Fix gio.FileInputStream docs
Fix gio.FileInputStream docs

Add implemented interface section and remove a method description

alexef/pygobject,davidmalcolm/pygobject,sfeltman/pygobject,MathieuDuponchelle/pygobject,thiblahute/pygobject,MathieuDuponchelle/pygobject,davibe/pygobject,alexef/pygobject,GNOME/pygobject,Distrotech/pygobject,jdahlin/pygobject,davidmalcolm/pygobject,davibe/pygobject,davibe/pygobject,nzjrs/pygobject,pexip/pygobject,jdahlin/pygobject,GNOME/pygobject,GNOME/pygobject,sfeltman/pygobject,davibe/pygobject,choeger/pygobject-cmake,thiblahute/pygobject,nzjrs/pygobject,jdahlin/pygobject,thiblahute/pygobject,pexip/pygobject,alexef/pygobject,Distrotech/pygobject,choeger/pygobject-cmake,sfeltman/pygobject,MathieuDuponchelle/pygobject,pexip/pygobject,Distrotech/pygobject,Distrotech/pygobject,nzjrs/pygobject,choeger/pygobject-cmake,davidmalcolm/pygobject