Remove double spaces.

docs/4.0/components/card.md

@@ -47,7 +47,7 @@ The building block of a card is the `.card-body`. Use it whenever you need a pad
 
 ### Titles, text, and links
 
-Card titles are used by adding `.card-title` to a `<h*>` tag. In the same way, links are added and placed next to each other by adding `.card-link` to  a `<a>` tag.
+Card titles are used by adding `.card-title` to a `<h*>` tag. In the same way, links are added and placed next to each other by adding `.card-link` to an `<a>` tag.
 
 Subtitles are used by adding a `.card-subtitle` to a `<h*>` tag. If the `.card-title` and the `.card-subtitle` items are placed in a `.card-body` item, the card title and subtitle are aligned nicely.
 

docs/4.0/components/collapse.md

@@ -35,7 +35,7 @@ You can use a link with the `href` attribute, or a button with the `data-target`
 ## Multiple targets
 
 A `<button>` or `<a>` can show and hide multiple elements by referencing them with a JQuery selector in its `href` or `data-target` attribute.
-Multiple `<button>` or `<a>` can  show and hide an element if they each reference it with their `href` or `data-target` attribute
+Multiple `<button>` or `<a>` can show and hide an element if they each reference it with their `href` or `data-target` attribute
 
 {% example html %}
 <p>

docs/4.0/components/list-group.md

@@ -217,7 +217,7 @@ Use the tab JavaScript plugin—include it individually or through the compiled
 
 ### Using data attributes
 
-You can activate a list group navigation without writing any JavaScript by simply specifying `data-toggle="list"` or  on an element. Use these data attributes on `.list-group-item`.
+You can activate a list group navigation without writing any JavaScript by simply specifying `data-toggle="list"` or on an element. Use these data attributes on `.list-group-item`.
 
 <div role="tabpanel">
 {% highlight html %}