minor mod to docs 2

docs/HTML/DataFrame.html

@@ -113,7 +113,7 @@ <H2><font color="blue">Summary</font></H2>
 
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-  <span style='color:#800000; font-weight:bold; '>class DateTime</span> included in this library is a cool and handy object to manipulate date/time with nanosecond precision and multi timezone capability. It has a very simple and intuitive interface that allows you to break date/time to their components, reassemble date/time from their components, advance or pullback date/time with different granularities, and more. Please see <a href="https://github.com/hosseinmoein/DataFrame/blob/master/docs/DateTimeDoc.pdf">DateTime documentation</a>.<BR>
+  <font size="+1"><B><span class="line_wrapper"><span style="color:#800000; font-weight:bold; ">class</span> DateTime<span style="color:#800080; ">;</span></span></B></font> included in this library is a cool and handy object to manipulate date/time with nanosecond precision and multi timezone capability. It has a very simple and intuitive interface that allows you to break date/time to their components, reassemble date/time from their components, advance or pullback date/time with different granularities, and more. Please see <a href="https://github.com/hosseinmoein/DataFrame/blob/master/docs/DateTimeDoc.pdf">DateTime documentation</a>.<BR>
 
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