[selectors-4][editorial] fix whitespace

Author: tabatkins

selectors-4/Overview.bs

@@ -351,7 +351,7 @@ Selectors Overview</h2>
 			<tr>
 				<td><code>E:checked</code>
 				<td>a user interface element E that is checked/selected
-					 (for instance a radio-button or checkbox)
+					(for instance a radio-button or checkbox)
 				<td>[[#checked]]
 				<td>3
 			<tr>
@@ -3441,7 +3441,7 @@ Calculating a selector's specificity</h2>
 				a specificity of (1,0,0)--
 				like an ID selector (''#foo'')--
 				when matched against any of
- 				<code>&lt;em></code>, <code>&lt;p id=foo></code>, or <code>&lt;em id=foo></code>.
+				<code>&lt;em></code>, <code>&lt;p id=foo></code>, or <code>&lt;em id=foo></code>.
 			<li>
 				''.qux:where(em, #foo#bar#baz)'' has
 				a specificity of (0,1,0):
@@ -4151,12 +4151,12 @@ Changes since the 2 May 2013 Working Draft</h3>
 		<li>Added a zero-specificity '':matches()''-type pseudo-class, with name TBD.
 		<li>Replaced subject indicator (''!'') feature with '':has()''.
 		<li>Replaced the '':nth-match()'' and '':nth-last-match()'' selectors
-		    with '':nth-child(&hellip; of <var>selector</var>)'' and '':nth-last-child(&hellip; of <var>selector</var>)''.
+			with '':nth-child(&hellip; of <var>selector</var>)'' and '':nth-last-child(&hellip; of <var>selector</var>)''.
 		<li>Changed the <css>:active-drop-target</css>, <css>:valid-drop-target</css>, <css>:invalid-drop-target</css> with '':drop()''.
 		<li>Sketched out an empty-or-whitespace-only selector for discussion
 			(See <a href="https://github.com/w3c/csswg-drafts/issues/1967">open issue</a>.)
 		<li>Renamed '':user-error'' to '':user-invalid''.
-		    (See <a href="https://www.w3.org/mid/CADhPm3v+WfeGQfBwwx8QBuiOjn2k38V_DcKW17Cm81VgZb1nbQ@mail.gmail.com">Discussion</a>)
+			(See <a href="https://www.w3.org/mid/CADhPm3v+WfeGQfBwwx8QBuiOjn2k38V_DcKW17Cm81VgZb1nbQ@mail.gmail.com">Discussion</a>)
 		<li>Renamed '':nth-column()''/'':nth-last-column()'' to '':nth-col()''/'':nth-last-col()''
 			to avoid naming confusion with a potential ''::column'' pseudo-class.
 		<li>Changed the non-functional form of the <css>:local-link</css> pseudo-class to account for fragment URLs.