Fix usage of “its” and “it’s”

docs/components/forms.md

@@ -169,7 +169,7 @@ Since Bootstrap applies `display: block` and `width: 100%` to almost all our for
 
 ### Form groups
 
-The `.form-group` class is the easiest way to add some structure to forms. It's only purpose is to provide `margin-bottom` around a label and control pairing. As a bonus, since it's a class you can use it with `<fieldset>`s, `<div>`s, or nearly any other element.
+The `.form-group` class is the easiest way to add some structure to forms. Its only purpose is to provide `margin-bottom` around a label and control pairing. As a bonus, since it's a class you can use it with `<fieldset>`s, `<div>`s, or nearly any other element.
 
 {% example html %}
 <form>

docs/components/jumbotron.md

@@ -26,7 +26,7 @@ To make the jumbotron full width, and without rounded corners, add the `.jumbotr
 <div class="jumbotron jumbotron-fluid">
   <div class="container">
     <h1 class="display-3">Fluid jumbotron</h1>
-    <p class="lead">This is a modified jumbotron that occupies the entire horizontal space of it's parent.</p>
+    <p class="lead">This is a modified jumbotron that occupies the entire horizontal space of its parent.</p>
   </div>
 </div>
 {% endexample %}

docs/components/popovers.md

@@ -268,7 +268,7 @@ Options can be passed via data attributes or JavaScript. For data attributes, ap
         <td>offsets</td>
         <td>string</td>
         <td>'0 0'</td>
-        <td>Offset of the popover relative to it's target. For more information refer to Tether's <a href="http://github.hubspot.com/tether/#constraints">offset docs</a>.</td>
+        <td>Offset of the popover relative to its target. For more information refer to Tether's <a href="http://github.hubspot.com/tether/#constraints">offset docs</a>.</td>
       </tr>
     </tbody>
   </table>

docs/components/tooltips.md

@@ -226,7 +226,7 @@ Options can be passed via data attributes or JavaScript. For data attributes, ap
         <td>offsets</td>
         <td>string</td>
         <td>'0 0'</td>
-        <td>Offset of the popover relative to it's target. For more information refer to Tether's <a href="http://github.hubspot.com/tether/#constraints">offset docs</a>.</td>
+        <td>Offset of the popover relative to its target. For more information refer to Tether's <a href="http://github.hubspot.com/tether/#constraints">offset docs</a>.</td>
       </tr>
     </tbody>
   </table>

docs/components/utilities.md

@@ -13,7 +13,7 @@ Bootstrap includes dozens of utilities—classes with a single purpose. They're
 
 ## Spacing
 
-Assign `margin` or `padding` to an element or a subset of it's sides with shorthand classes. Includes support for individual properties, all properties, and vertical and horizontal properties. All classes are multiples on the global default value, `1rem`.
+Assign `margin` or `padding` to an element or a subset of its sides with shorthand classes. Includes support for individual properties, all properties, and vertical and horizontal properties. All classes are multiples on the global default value, `1rem`.
 
 ### Margin