[css-flexbox-1] Fix links

Author: fantasai

css-flexbox-1/Overview.bs

@@ -554,17 +554,12 @@ Flex Containers: the ''flex'' and ''inline-flex'' 'display' values</h2>
 
 			<wpt>
 				display-flex-001.htm
-				display_flex_exist.html
 			</wpt>
 
 		<dt><dfn>inline-flex</dfn>
 		<dd>
 			This value causes an element to generate a <a>flex container</a> box
 			that is <a>inline-level</a> when placed in <a>flow layout</a>.
-
-			<wpt>
-				display_inline-flex_exist.html
-			</wpt>
 	</dl>
 
 	A <a>flex container</a> establishes a new <dfn export>flex formatting context</dfn> for its contents.
@@ -2849,7 +2844,7 @@ Definite and Indefinite Sizes</h3>
 		of its [=flex items=]
 		are treated as [=definite=].
 
-	2. If a [=flex-item’s=] [=flex basis=] is [=definite=],
+	2. If a [=flex item’s=] [=flex basis=] is [=definite=],
 		then its post-flexing [=main size=] is also [=definite=].
 
 	3. If a <a>single-line</a> <a>flex container</a> has a definite <a>cross size</a>,
@@ -3714,7 +3709,7 @@ Changes since the <a href="https://www.w3.org/TR/2018/CR-css-flexbox-1-20181119/
 					even though it can rely on the <a>indefinite</a> sizes
 					of any flex items in the same line</del>.
 
-					<li><ins>If a [=flex-item’s=] [=flex basis=] is [=definite=],
+					<li><ins>If a [=flex item’s=] [=flex basis=] is [=definite=],
 					then its post-flexing [=main size=] is also [=definite=].</ins>
 				</ol>
 			</blockquote>