docs: fix ASCII art so that iterators are aligned property to the diagram
docs: fix ASCII art so that iterators are aligned property to the diagram

surround-io/gstreamer,mparis/gstreamer,lubosz/gstreamer,mparis/gstreamer,krieger-od/gstreamer,surround-io/gstreamer,drothlis/gstreamer,StreamUtils/gstreamer,jpakkane/gstreamer,ylatuya/gstreamer,jpxiong/gstreamer,collects/gstreamer,mparis/gstreamer,centricular/gstreamer,mrchapp/gstreamer,cfoch/gstreamer,collects/gstreamer,justinjoy/gstreamer,centricular/gstreamer,mrchapp/gstreamer,ylatuya/gstreamer,mrchapp/gstreamer,centricular/gstreamer,magcius/gstreamer,shelsonjava/gstreamer,cfoch/gstreamer,ahmedammar/platform_external_gst_gstreamer,StreamUtils/gstreamer,ylatuya/gstreamer,magcius/gstreamer,centricular/gstreamer,ensonic/gstreamer,lubosz/gstreamer,lubosz/gstreamer,collects/gstreamer,drothlis/gstreamer,jpakkane/gstreamer,StreamUtils/gstreamer,Lachann/gstreamer,jpxiong/gstreamer,krichter722/gstreamer,justinjoy/gstreamer,ensonic/gstreamer,drothlis/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer,cfoch/gstreamer,collects/gstreamer,shelsonjava/gstreamer,lovebug356/gstreamer,StreamUtils/gstreamer,surround-io/gstreamer,jpxiong/gstreamer,ahmedammar/platform_external_gst_gstreamer,jpakkane/gstreamer,krichter722/gstreamer,Distrotech/gstreamer,shelsonjava/gstreamer,drothlis/gstreamer,ahmedammar/platform_external_gst_gstreamer,ylatuya/gstreamer,mparis/gstreamer,krichter722/gstreamer,krieger-od/gstreamer,Lachann/gstreamer,cfoch/gstreamer,magcius/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,krichter722/gstreamer,ahmedammar/platform_external_gst_gstreamer,jpxiong/gstreamer,lubosz/gstreamer,magcius/gstreamer,ensonic/gstreamer,Distrotech/gstreamer,cablelabs/gstreamer,cablelabs/gstreamer,lovebug356/gstreamer,Lachann/gstreamer,mrchapp/gstreamer,Distrotech/gstreamer,krieger-od/gstreamer,surround-io/gstreamer,Distrotech/gstreamer,krieger-od/gstreamer,ensonic/gstreamer,ahmedammar/platform_external_gst_gstreamer,lovebug356/gstreamer,krichter722/gstreamer,lovebug356/gstreamer,justinjoy/gstreamer,mparis/gstreamer,magcius/gstreamer,krieger-od/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,cfoch/gstreamer,lovebug356/gstreamer,lubosz/gstreamer,surround-io/gstreamer,cablelabs/gstreamer,cablelabs/gstreamer,Distrotech/gstreamer,ylatuya/gstreamer,Lachann/gstreamer,cablelabs/gstreamer,mrchapp/gstreamer,ensonic/gstreamer,jpakkane/gstreamer,collects/gstreamer,jpakkane/gstreamer,drothlis/gstreamer,centricular/gstreamer,shelsonjava/gstreamer