Normative: reject unwanted partial innerText match

Author: jugglinmike

index.bs

@@ -3051,7 +3051,8 @@ and |session|:
       1. If |match type| is <code>"full"</code> and |node text| [=is=] |search text|,
          [=list/append=] |context node| to |returned nodes|.
 
-      1. Otherwise, [=list/append=] |context node| to |returned nodes|.
+      1. Otherwise, if |match type| is <code>"partial"</code>, [=list/append=]
+         |context node| to |returned nodes|.
 
     1. Otherwise, perform the following steps: