fix: MD012 multiple blank lines (#12181)

Author: nschonni

files/en-us/glossary/advance_measure/index.md

@@ -15,4 +15,3 @@ For a horizontal inline axis, this will be the width of the character.
 ## See also
 
 - {{cssxref("<length>")}}
-

files/en-us/glossary/hoisting/index.md

@@ -16,7 +16,6 @@ Note that doing so can lead to unexpected errors, and is not generally recommend
 > **Note:** The term hoisting is not used in any normative specification prose prior to [ECMAScript® 2015 Language Specification](https://www.ecma-international.org/ecma-262/6.0/index.html).
 > Hoisting was thought up as a general way of thinking about how execution contexts (specifically the creation and execution phases) work in JavaScript.
 
-
 ## Function hoisting
 
 One of the advantages of hoisting is that it lets you use a function before you declare it in your code.
@@ -45,7 +44,6 @@ The result of the code above is the same: "My cat's name is Tiger"
 */
 ```
 
-
 ## Variable hoisting
 
 Hoisting works with variables too, so you can use a variable in code before it is declared and/or initialized.
@@ -112,13 +110,11 @@ The code will succeed provided the line that initializes the variable is execute
 
 For information and examples see [`let` > temporal dead zone](/en-US/docs/Web/JavaScript/Reference/Statements/let#temporal_dead_zone_tdz).
 
-
 ## `class` hoisting
 
 Classes defined using a [class declaration](/en-US/docs/Web/JavaScript/Reference/Classes#class_declarations) are hoisted, which means that JavaScript has a reference to the class.
 However the class is not initialized by default, so any code that uses it before the line in which it is initialized is executed will throw a `ReferenceError`.
 
-
 ## Function and class expression hoisting
 
 [Function expressions](/en-US/docs/Web/JavaScript/Reference/Operators/function) and [class expressions](/en-US/docs/Web/JavaScript/Reference/Classes#class_expressions) are not hoisted.
@@ -127,7 +123,6 @@ The expressions evaluate to a function or class (respectively), which are typica
 In this case the variable declaration is hoisted and the expression is its initialization.
 Therefore the expressions are not evaluated until the relevant line is executed.
 
-
 ## See also
 
 - [`var` statement](/en-US/docs/Web/JavaScript/Reference/Statements/var) — MDN

files/en-us/glossary/parameter/index.md

@@ -20,7 +20,6 @@ const argument = 'foo';
 example(argument);
 ```
 
-
 Note the difference between _parameters_ and _arguments_:
 
 - Function parameters are the names listed in the function's definition.

files/en-us/glossary/transferable_objects/index.md

@@ -47,7 +47,6 @@ console.log(uInt8Array.byteLength);  // 0
 > However their underlying buffer is an {{jsxref("ArrayBuffer")}}, which is a transferable object.
 > We could have sent `uInt8Array.buffer` in the data parameter, but not `uInt8Array` in the transfer array.
 
-
 ### Transferring during a cloning operation
 
 The code below shows a {{domxref("structuredClone()")}} operation where the underlying buffer is copied from the original object to the clone.
@@ -87,7 +86,6 @@ The items that can be _transferred_ are:
 - {{domxref("VideoFrame")}}
 - {{domxref("OffscreenCanvas")}}
 
-
 > **Note:** Transferrable objects are marked up in [Web IDL files](https://github.com/w3c/webref/tree/main/ed/idl) with the attribute `Transferrable`.
 
 ## See also

files/en-us/glossary/transient_activation/index.md

@@ -21,5 +21,3 @@ Examples of APIs that require _transient activation_ are:
 
 - {{domxref("MediaDevices.selectAudioOutput()")}}
 - [HTML Living Standard > Transient activation](https://html.spec.whatwg.org/multipage/interaction.html#transient-activation)
-
-

files/en-us/learn/javascript/building_blocks/events/index.md

@@ -444,7 +444,6 @@ The output is as follows:
 
 > **Note:** for the full source code, see [preventdefault-validation.html](https://github.com/mdn/learning-area/blob/master/javascript/building-blocks/events/preventdefault-validation.html) (also see it [running live](https://mdn.github.io/learning-area/javascript/building-blocks/events/preventdefault-validation.html) here.)
 
-
 ## Event bubbling and capture
 
 Event bubbling and capture are terms that describe phases in how the browser handles events targeted at nested elements.

files/en-us/learn/javascript/building_blocks/looping_code/index.md

@@ -77,7 +77,6 @@ button {
 
 Here's the JavaScript code that implements this example:
 
-
 ```js
 const btn = document.querySelector('button');
 const canvas = document.querySelector('canvas');
@@ -932,7 +931,6 @@ for (const item of array) {
 }
 ```
 
-
 `for`:
 
 ```

files/en-us/learn/performance/video/index.md

@@ -113,8 +113,6 @@ Offering more modest bandwidth savings, setting `preload="metadata"` may downloa
 
 Changing the setting to `auto` tells the browser to automatically download the entire video. Do this only when playback is very likely. Otherwise, it wastes a lot of bandwidth.
 
-
-
 ### Consider streaming
 
 [Video streaming allows the proper video size and bandwidth](https://www.smashingmagazine.com/2018/10/video-playback-on-the-web-part-2/) (based on network speed) to be delivered to the end user. Similar to responsive images, the correct size video is delivered to the browser, ensuring fast video startup, low buffering, and optimized playback.

files/en-us/learn/server-side/django/generic_views/index.md

@@ -194,12 +194,9 @@ You might also use the `{% empty %}` template tag to define what happens if the
 </ul>
 ```
 
-
 While not used here, within the loop Django will also create other variables that you can use to track the iteration.
 For example, you can test the `forloop.last` variable to perform conditional processing the last time that the loop is run.
 
-
-
 #### Accessing variables
 
 The code inside the loop creates a list item for each book that shows both the title (as a link to the yet-to-be-created detail view) and the author.

files/en-us/mdn/structures/page_types/api_landing_page_template/index.md

@@ -159,7 +159,6 @@ And/or include a list of links to useful code samples that live elsewhere:
 
 {{Compat("path.to.feature.Interface_1")}}
 
-
 {{Compat("path.to.feature.Interface_2")}}
 
 ## See also