Give all embedded live docs examples data-example-id attrs

Refs #11410

docs/_includes/components/input-groups.html

@@ -22,7 +22,7 @@
   <p>Place one add-on or button on either side of an input. You may also place one on both sides of an input.</p>
   <p><strong class="text-danger">We do not support multiple add-ons on a single side.</strong></p>
   <p><strong class="text-danger">We do not support multiple form-controls in a single input group.</strong></p>
-  <form class="bs-example bs-example-form">
+  <form class="bs-example bs-example-form" data-example-id="simple-input-groups">
     <div class="input-group">
       <span class="input-group-addon">@</span>
       <input type="text" class="form-control" placeholder="Username">
@@ -59,7 +59,7 @@
 
   <h2 id="input-groups-sizing">Sizing</h2>
   <p>Add the relative form sizing classes to the <code>.input-group</code> itself and contents within will automatically resize—no need for repeating the form control size classes on each element.</p>
-  <form class="bs-example bs-example-form">
+  <form class="bs-example bs-example-form" data-example-id="input-group-sizing">
     <div class="input-group input-group-lg">
       <span class="input-group-addon">@</span>
       <input type="text" class="form-control" placeholder="Username">
@@ -95,7 +95,7 @@
 
   <h2 id="input-groups-checkboxes-radios">Checkboxes and radio addons</h2>
   <p>Place any checkbox or radio option within an input group's addon instead of text.</p>
-  <form class="bs-example bs-example-form">
+  <form class="bs-example bs-example-form" data-example-id="input-group-with-checkbox-radio">
     <div class="row">
       <div class="col-lg-6">
         <div class="input-group">
@@ -139,7 +139,7 @@
 
   <h2 id="input-groups-buttons">Button addons</h2>
   <p>Buttons in input groups are a bit different and require one extra level of nesting. Instead of <code>.input-group-addon</code>, you'll need to use <code>.input-group-btn</code> to wrap the buttons. This is required due to default browser styles that cannot be overridden.</p>
-  <form class="bs-example bs-example-form">
+  <form class="bs-example bs-example-form" data-example-id="input-group-with-button">
     <div class="row">
       <div class="col-lg-6">
         <div class="input-group">
@@ -182,7 +182,7 @@
 
   <h2 id="input-groups-buttons-dropdowns">Buttons with dropdowns</h2>
   <p></p>
-  <form class="bs-example bs-example-form">
+  <form class="bs-example bs-example-form" data-example-id="input-group-dropdowns">
     <div class="row">
       <div class="col-lg-6">
         <div class="input-group">
@@ -252,7 +252,7 @@
 {% endhighlight %}
 
   <h2 id="input-groups-buttons-segmented">Segmented buttons</h2>
-  <form class="bs-example bs-example-form">
+  <form class="bs-example bs-example-form" data-example-id="input-group-segmented-buttons">
     <div class="row">
       <div class="col-lg-6">
         <div class="input-group">