update urls

docs/4.0/layout/grid.md

@@ -37,7 +37,7 @@ Breaking it down, here's how it works:
 - Column classes indicate the number of columns you'd like to use out of the possible 12 per row. So, if you want three equal-width columns, you can use `.col-sm-4`.
 - Column `width`s are set in percentages, so they're always fluid and sized relative to their parent element.
 - Columns have horizontal `padding` to create the gutters between individual columns, however, you can remove the `margin` from rows and `padding` from columns with `.no-gutters` on the `.row`.
-- There are five grid tiers, one for each [responsive breakpoint]({{ site.baseurl }}/layout/overview/#responsive-breakpoints): all breakpoints (extra small), small, medium, large, and extra large.
+- There are five grid tiers, one for each [responsive breakpoint]({{ site.baseurl }}/docs/{{ site.docs_version }}/layout/overview/#responsive-breakpoints): all breakpoints (extra small), small, medium, large, and extra large.
 - Grid tiers are based on minimum widths, meaning they apply to that one tier and all those above it (e.g., `.col-sm-4` applies to small, medium, large, and extra large devices).
 - You can use predefined grid classes or Sass mixins for more semantic markup.
 
@@ -242,7 +242,7 @@ Use `col-{breakpoint}-auto` classes to size columns based on the natural width o
 
 ### Equal-width multi-row
 
-Create equal-width columns that span multiple rows by inserting a `.w-100` where you want the columns to break to a new line. Make the breaks responsive by mixing the `.w-100` with some [responsive display utilities]({{ site.baseurl }}/utilities/display-property/).
+Create equal-width columns that span multiple rows by inserting a `.w-100` where you want the columns to break to a new line. Make the breaks responsive by mixing the `.w-100` with some [responsive display utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/display-property/).
 
 <div class="bd-example-row">
 {% example html %}
@@ -441,7 +441,7 @@ Use flexbox alignment utilities to vertically and horizontally align columns.
 
 The gutters between columns in our predefined grid classes can be removed with `.no-gutters`. This removes the negative `margin`s from `.row` and the horizontal `padding` from all immediate children columns.
 
-Here's the source code for creating these styles. Note that column overrides are scoped to only the first children columns and are targeted via [attribute selector](https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors). While this generates a more specific selector, column padding can still be further customized with [spacing utilities]({{ site.baseurl }}/utilities/spacing/).
+Here's the source code for creating these styles. Note that column overrides are scoped to only the first children columns and are targeted via [attribute selector](https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors). While this generates a more specific selector, column padding can still be further customized with [spacing utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/spacing/).
 
 {% highlight sass %}
 .no-gutters {
@@ -483,7 +483,7 @@ If more than 12 columns are placed within a single row, each group of extra colu
 
 ### Column resets
 
-With the handful of grid tiers available, you're bound to run into issues where, at certain breakpoints, your columns don't clear quite right as one is taller than the other. To fix that, use a combination of a `.clearfix` and our [responsive display utilities]({{ site.baseurl }}/utilities/display/).
+With the handful of grid tiers available, you're bound to run into issues where, at certain breakpoints, your columns don't clear quite right as one is taller than the other. To fix that, use a combination of a `.clearfix` and our [responsive display utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/display/).
 
 <div class="bd-example-row">
 {% example html %}
@@ -500,7 +500,7 @@ With the handful of grid tiers available, you're bound to run into issues where,
 {% endexample %}
 </div>
 
-In addition to column clearing at responsive breakpoints, you may need to **reset offsets, pushes, or pulls**. See this in action in [the grid example]({{ site.baseurl }}/examples/grid/).
+In addition to column clearing at responsive breakpoints, you may need to **reset offsets, pushes, or pulls**. See this in action in [the grid example]({{ site.baseurl }}/docs/{{ site.docs_version }}/examples/grid/).
 
 <div class="bd-example-row">
 {% example html %}

docs/4.0/layout/media-object.md

@@ -10,7 +10,7 @@ toc: true
 
 The [media object](http://www.stubbornella.org/content/2010/06/25/the-media-object-saves-hundreds-of-lines-of-code/) helps build complex and repetitive components where some media is positioned alongside content that doesn't wrap around said media. Plus, it does this with only two required classes thanks to flexbox.
 
-Below is an example of a single media object. Only two classes are required—the wrapping `.media` and the `.media-body` around your content. Optional padding and margin can be controlled through [spacing utilities]({{ site.baseurl }}/utilities/spacing/).
+Below is an example of a single media object. Only two classes are required—the wrapping `.media` and the `.media-body` around your content. Optional padding and margin can be controlled through [spacing utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/spacing/).
 
 {% example html %}
 <div class="media">
@@ -25,7 +25,7 @@ Below is an example of a single media object. Only two classes are required—th
 {% callout warning %}
 ##### Flexbug #12: Inline elements aren't treated as flex items
 
-Internet Explorer 10-11 do not render inline elements like links or images (or `::before` and `::after` pseudo-elements) as flex items. The only workaround is to set a non-inline `display` value (e.g., `block`, `inline-block`, or `flex`). We suggest using `.d-flex`, one of our [display utilities]({{ site.baseurl }}/utilities/display-property/), as an easy fix.
+Internet Explorer 10-11 do not render inline elements like links or images (or `::before` and `::after` pseudo-elements) as flex items. The only workaround is to set a non-inline `display` value (e.g., `block`, `inline-block`, or `flex`). We suggest using `.d-flex`, one of our [display utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/display-property/), as an easy fix.
 
 **Source:** [Flexbugs on GitHub](https://github.com/philipwalton/flexbugs#12-inline-elements-are-not-treated-as-flex-items)
 {% endcallout %}