[css-syntax] Fix "Convert a string to a number", use <var>e</var> for the exponent

Author: SimonSapin

css-syntax/Overview.html

@@ -1541,8 +1541,8 @@ <h4 data-level=4.3.13 id=convert-a-string-to-a-number><span class=secno>4.3.13 <
 		<li>An <b>exponent</b>:
 			zero or more <a data-autolink=link href=#digit>digits</a>.
 			If there is at least one digit,
-			let <var>i</var> be the number formed by interpreting the digits as a base-10 integer;
-			otherwise, let <var>i</var> be the number 0.
+			let <var>e</var> be the number formed by interpreting the digits as a base-10 integer;
+			otherwise, let <var>e</var> be the number 0.
 	</ol>
 
 <p>	Return the number <code>s·(i + f·10<sup>-d</sup>)·10<sup>te</sup></code>.

css-syntax/Overview.src.html

@@ -1428,8 +1428,8 @@ <h4>
 		<li>An <b>exponent</b>:
 			zero or more <a>digits</a>.
 			If there is at least one digit,
-			let <var>i</var> be the number formed by interpreting the digits as a base-10 integer;
-			otherwise, let <var>i</var> be the number 0.
+			let <var>e</var> be the number formed by interpreting the digits as a base-10 integer;
+			otherwise, let <var>e</var> be the number 0.
 	</ol>
 
 	Return the number <code>s·(i + f·10<sup>-d</sup>)·10<sup>te</sup></code>.