[css-flexbox] Fortunately, we're tasked with making pretty HTML diffs of our changes before we publish, so I get to notice nonsensical errors like this one in our edits for fixing w3c#995. Correct use of start/end vs first/last in definition of baselines, cuz the original fix was random and not correct. >_<

Author: fantasai

css-flexbox/Overview.bs

@@ -2204,20 +2204,20 @@ Flex Container Baselines</h3>
 
 			1. If any of the <a>flex items</a> on the flex container's startmost/endmost <a>flex line</a>
 				<a href="#baseline-participation">participate in baseline alignment</a>,
-				the flex container's startmost/endmost <a>main-axis baseline set</a>
+				the flex container's first/last <a>main-axis baseline set</a>
 				is <a lt="generate baselines">generated</a> from
 				the shared <a>alignment baseline</a> of those <a>flex items</a>.
 
 			2. Otherwise, if the flex container has at least one <a>flex item</a>,
-				the flex container's startmost/endmost <a>main-axis baseline set</a>
+				the flex container's first/last <a>main-axis baseline set</a>
 				is <a lt="generate baselines">generated</a> from
-				the <a>alignment baseline</a> of the first/last <a>flex item</a>.
+				the <a>alignment baseline</a> of the startmost/endmost <a>flex item</a>.
 				(If that item has no <a>alignment baseline</a>
 				parallel to the flex container's <a>main axis</a>,
 				then one is first <a lt="synthesized baseline">synthesized</a>
 				from its border edges.)
 
-			3. Otherwise, the flex container has no startmost/endmost main-axis <a>baseline set</a>,
+			3. Otherwise, the flex container has no first/last main-axis <a>baseline set</a>,
 				and one is <a lt="synthesize baselines">synthesized</a> if needed
 				according to the rules of its <a>alignment context</a>.
 
@@ -2232,7 +2232,7 @@ Flex Container Baselines</h3>
 			1. If the flex container has at least one <a>flex item</a>,
 				the flex container's first/last <a>cross-axis baseline set</a>
 				is <a lt="generate baselines">generated</a> from
-				the <a>alignment baseline</a> of the first/last <a>flex item</a>.
+				the <a>alignment baseline</a> of the startmost/endmost <a>flex item</a>.
 				(If that item has no <a>alignment baseline</a>
 				parallel to the flex container's <a>cross axis</a>,
 				then one is first <a lt="synthesized baseline">synthesized</a>