clarified second argument to split()

generators.html

@@ -283,7 +283,7 @@ rules = []
 <li>The <code>build_match_and_apply_functions()</code> function has not changed. You&#8217;re still using closures to build two functions dynamically that use variables defined in the outer function.
 <li>The global <code>open()</code> function opens a file and returns a file object. In this case, the file we&#8217;re opening contains the pattern strings for pluralizing nouns. The <code>with</code> statement creates what&#8217;s called a <i>context</i>: when the <code>with</code> block ends, Python will automatically close the file, even if an exception is raised inside the <code>with</code> block. You&#8217;ll learn more about <code>with</code> blocks and file objects in the <a href=files.html>Files</a> chapter.
 <li>The <code>for line in &lt;fileobject></code> idiom reads data from the open file, one line at a time, and assigns the text to the <var>line</var> variable. You&#8217;ll learn more about reading from files in the <a href=files.html>Files</a> chapter.
-<li>Each line in the file really has three values, but they&#8217;re separated by whitespace (tabs or spaces, it makes no difference). To split it out, use the <code>split()</code> string method. The first argument to the <code>split()</code> method is <code>None</code>, which means &#8220;split on any whitespace (tabs or spaces, it makes no difference).&#8221; The second argument is <code>3</code>, which means &#8220;split on whitespace 3 times, then discard the rest of the line.&#8221; A line like <code>[sxz]$ $ es</code> will be broken up into the list <code>['[sxz]$', '$', 'es']</code>, which means that <var>pattern</var> will get <code>'[sxz]$'</code>, <var>search</var> will get <code>'$'</code>, and <var>replace</var> will get <code>'es'</code>. That&#8217;s a lot of power in one little line of code.
+<li>Each line in the file really has three values, but they&#8217;re separated by whitespace (tabs or spaces, it makes no difference). To split it out, use the <code>split()</code> string method. The first argument to the <code>split()</code> method is <code>None</code>, which means &#8220;split on any whitespace (tabs or spaces, it makes no difference).&#8221; The second argument is <code>3</code>, which means &#8220;split on whitespace 3 times, then leave the rest of the line alone.&#8221; A line like <code>[sxz]$ $ es</code> will be broken up into the list <code>['[sxz]$', '$', 'es']</code>, which means that <var>pattern</var> will get <code>'[sxz]$'</code>, <var>search</var> will get <code>'$'</code>, and <var>replace</var> will get <code>'es'</code>. That&#8217;s a lot of power in one little line of code.
 <li>Finally, you pass <code>pattern</code>, <code>search</code>, and <code>replace</code> to the <code>build_match_and_apply_functions()</code> function, which returns a tuple of functions. You append this tuple to the <var>rules</var> list, and <var>rules</var> ends up storing the list of match and apply functions that the <code>plural()</code> function expects.
 </ol>