Separate multiple paragraphs with <p> tags

index.html

@@ -1947,8 +1947,10 @@ <h2>
   </h2>
   <p>
     The Compute Pressure API poses a challenge to test authors, as fully
-    exercising interface requires physical hardware devices that respond in predictable ways.
-
+    exercising interface requires physical hardware devices that respond in
+    predictable ways.
+  </p>
+  <p>
     To address this challenge this document defines a [[WEBDRIVER2]] [=extension
     commands=] that allows defining and controlling virtual pressure sources that behave
     like real ones and which can have particular properties and whose readings can be