12b: the inline directive forms read and spell the !adf: prefix

corpus/round-trip/inline-nodes/text-whitespace.md

@@ -1,15 +1,15 @@
-:text{text="  "}Two leading spaces held, and one text node split:text{text="\n"}over two lines.
+!adf:text{text="  "}Two leading spaces held, and one text node split!adf:text{text="\n"}over two lines.
 
-Trailing space held:text{text=" "}
+Trailing space held!adf:text{text=" "}
 
-:text{text="\t"}Tabbed at the block edge.
+!adf:text{text="\t"}Tabbed at the block edge.
 
-Space before the break:text{text=" "}\
+Space before the break!adf:text{text=" "}\
 survives.
 
 Space after the break\
-:text{text=" "}survives too.
+!adf:text{text=" "}survives too.
 
-Kept _:text{text=" "}inside:text{text=" "}_, exactly.
+Kept _!adf:text{text=" "}inside!adf:text{text=" "}_, exactly.
 
 Edged with the whitespace CommonMark keeps