typo improvement

Author: nicholascar

shacl12-profiling/index.html

@@ -687,9 +687,10 @@ <h3>Document Conventions</h3>
 				</p>
 				<p>
 					Throughout the document, color-coded boxes containing RDF graphs in Turtle and JSON-LD will appear.
-					These fragments of Turtle documents use the prefix bindings given above.
+					The color of the box as well as a title indicate whether they are a Shapes graph, a Data graph, or something else.
+					The Turtle document fragments use the prefix bindings given above.
 					The JSON-LD document fragments use the context given above.
-					Only the Turtle documents may highlight certain parts.
+					Only the Turtle documents will have highlight parts.
 				</p>
 
 				<div class="shapes-graph">