add tab space in html code example

Example 1: add tabs html

&nbsp;  <!-- 1 space -->
&ensp;	<!-- tab; 2 space -->
&emsp;	<!-- tab; 4 space -->

Example 2: html tab character

	 or &tab;

Example 3: tab space in html

<p style="text-indent :5em;" > </p>

Example 4: adding space tab in html

<d style="padding-left:1em;" > </d>