Stop using weird Haml break for changelog preview

It’s really not worth the double filter call and I’m sure I can find
some way to use Middleman to extract this into a method.

source/cs/0.3.0/index.html.haml

@@ -16,9 +16,8 @@ version: 0.3.0
   Changelog je soubor, který obsahuje organizovaný, chronologicky seřazený
   seznam podstatných změn pro každou verzi daného projektu.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### Co je smyslem changelogu?
   Usnadnit uživatelům a přispěvatelům přesné zobrazení podstatných změn, které
   byly provedeny mezi jednotlivými vydáními (verzemi) daného projektu.

source/de/0.3.0/index.html.haml

@@ -17,9 +17,8 @@ version: 0.3.0
   Liste aller erheblichen Änderungen enthält, die zwischen Veröffentlichungen (oder Versionen)
   des Projekts umgesetzt wurden.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### Was ist der Zweck eines Changelogs?
   Es Benutzern und Entwicklern einfacher zu machen, gerade die beachtenswerten Änderungen, welche
   zwischen Veröffentlichungen (oder Versionen) des Projekts gemacht wurden, zu sehen.

source/en/0.3.0/index.html.haml

@@ -16,9 +16,8 @@ version: 0.3.0
   A change log is a file which contains a curated, chronologically ordered
   list of notable changes for each version of a project.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### What’s the point of a change log?
   To make it easier for users and contributors to see precisely what
   notable changes have been made between each release (or version) of the project.

source/en/0.4.0/index.html.haml

@@ -12,14 +12,13 @@ version: 0.4.0
 
   Version **#{current_page.metadata[:page][:version]}**
 
-  ### What’s a change log?
+  ### What’s a changelog?
-  A change log is a file which contains a curated, chronologically ordered
+  A changelog is a file which contains a curated, chronologically ordered
   list of notable changes for each version of a project.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
+  ### What’s the point of a changelog?
-  ### What’s the point of a change log?
   To make it easier for users and contributors to see precisely what
   notable changes have been made between each release (or version) of the project.
 
@@ -33,10 +32,10 @@ version: 0.4.0
   contributors should care, and the motivations behind this project.
   If you can spare the time (1:06), it’s a good listen.
 
-  ### What makes a good change log? 
+  ### What makes a good changelog?
   I’m glad you asked.
 
-  A good change log sticks to these principles:
+  A good changelog sticks to these principles:
 
   - It’s made for humans, not machines, so legibility is crucial.
   - Easy to link to any section (hence Markdown over plain text).
@@ -76,15 +75,15 @@ version: 0.4.0
     it differently. "2012-06-02" works logically from largest to smallest, doesn't
     overlap in ambiguous ways with other date formats, and is an
     [ISO standard](http://www.iso.org/iso/home/standards/iso8601.htm). Thus, it
-    is the recommended date format for change logs.
+    is the recommended date format for changelogs.
 
   There’s more. Help me collect those unicorn tears by
   [opening an issue][issues]
   or a pull request.
 
-  ### Is there a standard change log format?
+  ### Is there a standard changelog format?
   Sadly, no. Calm down. I know you're furiously rushing to find that link
-  to the GNU change log style guide, or the two-paragraph GNU NEWS file
+  to the GNU changelog style guide, or the two-paragraph GNU NEWS file
   "guideline". The GNU style guide is a nice start but it is sadly naive.
   There's nothing wrong with being naive but when people need
   guidance it's rarely very helpful. Especially when there are many
@@ -96,7 +95,7 @@ version: 0.4.0
   real software projects. Please take a look around and remember that
   [discussions and suggestions for improvements are welcome][issues]!
 
-  ### What should the change log file be named?
+  ### What should the changelog file be named?
   Well, if you can’t tell from the example above, `CHANGELOG.md` is the
   best convention so far.
 
@@ -107,24 +106,24 @@ version: 0.4.0
 
   ### Why can’t people just use a `git log` diff?
   Because log diffs are full of noise — by nature. They could not make a suitable
-  change log even in a hypothetical project run by perfect humans who never make
+  changelog even in a hypothetical project run by perfect humans who never make
   typos, never forget to commit new files, never miss any part of a refactoring.
   The purpose of a commit is to document one atomic step in the process by which
-  the code evolves from one state to another. The purpose of a change log is to
+  the code evolves from one state to another. The purpose of a changelog is to
   document the noteworthy differences between these states.
 
   As is the difference between good comments and the code itself,
-  so is the difference between a change log and the commit log:
+  so is the difference between a changelog and the commit log:
   one describes the *why*, the other the how.
 
-  ### Can change logs be automatically parsed?
+  ### Can changelogs be automatically parsed?
   It’s difficult, because people follow wildly different formats and file names.
 
   [Vandamme][vandamme] is a Ruby gem
   created by the [Gemnasium][gemnasium] team and which parses
-  many (but not all) open source project change logs.
+  many (but not all) open source project changelogs.
 
-  ### Why do you alternate between spelling it "CHANGELOG" and "change log"?
+  ### Why do you alternate between spelling it "CHANGELOG" and "changelog"?
   "CHANGELOG" is the name of the file itself. It's a bit shouty but it's a
   historical convention followed by many open source projects. Other
   examples of similar files include [`README`][README], [`LICENSE`][LICENSE],
@@ -135,7 +134,7 @@ version: 0.4.0
   metadata about the project, they could be useful to anyone intending to use
   or contribute to it, much like [open source project badges][shields].
 
-  When I refer to a "change log", I'm talking about the function of this
+  When I refer to a "changelog", I'm talking about the function of this
   file: to log changes.
 
   ### What about yanked releases?
@@ -149,14 +148,14 @@ version: 0.4.0
   notice it. Since it's surrounded by brackets it's also easier to parse
   programmatically.
 
-  ### Should you ever rewrite a change log?
+  ### Should you ever rewrite a changelog?
-  Sure. There are always good reasons to improve a change log. I regularly open
+  Sure. There are always good reasons to improve a changelog. I regularly open
   pull requests to add missing releases to open source projects with unmaintained
-  change logs.
+  changelogs.
 
   It's also possible you may discover that you forgot to address a breaking change
   in the notes for a version. It's obviously important for you to update your
-  change log in this case.
+  changelog in this case.
 
   ### How can I contribute?
   This document is not the **truth**; it’s my carefully considered

source/es-ES/0.3.0/index.html.haml

@@ -16,9 +16,8 @@ version: 0.3.0
 
   Un registro de cambios o “change log” de ahora en adelante, es un archivo que contiene una lista en orden cronológico sobre los cambios que vamos haciendo en cada reléase (o versión) de nuestro proyecto.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### Cuál es el propósito del change log?
 
   Para que les sea más fácil a los usuarios y contribuyentes, ver exactamente los cambios notables que se han hecho entre cada versión (o versiones) del proyecto.

source/fr/0.3.0/index.html.haml

@@ -17,9 +17,8 @@ version: 0.3.0
   une liste triée chronologiquement des changements notables pour chaque
   version d’un projet
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### Quel est l’intérêt d’un change log ?
   Il permet aux utilisateurs et aux contributeurs de voir plus simplement
   les changements notables qui ont été réalisés entre chaque publication

source/it-IT/0.3.0/index.html.haml

@@ -13,9 +13,8 @@ language: it-IT
   Un change log è un file che contiene una lista curata e ordinata cronologicamente
   delle modifiche degne di nota per ogni versione di un progetto.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### A cosa serve un change log?
   Per rendere facile agli utilizzatori e contribuenti vedere con precisione quali modifiche
   importanti sono state fatte tra ogni release (o versione) del progetto.

source/layouts/layout.html.haml

@@ -52,6 +52,9 @@
                 for now and
                 = link_to "help translate ", "https://github.com/olivierlacan/keep-a-changelog/issues"
                 it.
+
+        - content = Haml::Filters::Code.render(yield)
+        = Redcarpet::Markdown.new(Redcarpet::Render::HTML_TOC.new(nesting_level: 5), { with_toc_data: true }).render(content).html_safe
         = yield
 
       %footer.clearfix{role: "banner"}

source/pl-PL/0.3.0/index.html.haml

@@ -15,9 +15,8 @@ version: 0.3.0
   ### Czym jest changelog?
   Changelog, inaczej rejestr zmian lub historia zmian, to plik zawierający chronologicznie uporządkowaną listę istotnych zmian dla każdej wersji projektu.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### Co jest celem prowadzenia changelogu?
   Changelog pomaga użytkownikom zrozumieć, jakie znaczące zmiany zostały wprowadzone w każdej wersji projektu.
 

source/pt-BR/0.3.0/index.html.haml

@@ -18,9 +18,8 @@ version: 0.3.0
   cronologicamente, de mudanças significativas para cada versão de um projeto
   open source.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### Para que serve um *change log*?
 
   Para facilitar para os usuários e contribuidores verem precisamente quais

source/ru/0.3.0/index.html.haml

@@ -18,9 +18,8 @@ version: 0.3.0
   хронологическом порядке список значимых изменений для каждой версии проекта с
   открытым исходным кодом.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### Для чего нужен лог изменений?
 
   Чтобы пользователи и контрибьюторы могли с меньшими усилиями точно

source/sl/0.3.0/index.html.haml

@@ -16,9 +16,8 @@ version: 0.3.0
   Dnevnik sprememb je datoteka, ki vsebuje kuriran, kronološko urejen
   seznam opaznih sprememb za vsako verzijo projekta.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### Kaj je smisel dnevnika sprememb?
   Za poenostavitev, da uporabniki in prispevajoči sodelavci natančno vidijo, katere
   opazne spremembe so bile narejene med vsako izdajo (ali verzijo) projekta.

source/sv/0.3.0/index.html.haml

@@ -16,9 +16,8 @@ version: 0.3.0
   En ändringslogg är en fil innehållandes en sammanfattad, kronologiskt ordnad
   lista över ändringar för varje version av ett projekt.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### Vad är meningen med en ändringslogg?
   För att göra det enkelt för användare och medarbetare att se exakt vilka
   viktiga ändringar som har gjorts mellan varje utgåva (eller version) av projektet.

source/tr-TR/0.3.0/index.html.haml

@@ -14,9 +14,8 @@ version: 0.3.0
   Değişiklik kayıtları bir proje için özel olarak hazırlanmış, tarihsel sıralamayla
   sıralanmış, önemli değişikliklerin bir bütünüdür.
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### Değişikliklerin kayıtlarını tutmanın anlamı ne?
   Bir projenin kullanıcılarının ya da katılımcılarının, dağıtımlar (ya da sürümler)
   arasındaki tam olarak hangi önemli değişikliklerin olduğunu takip edebilmelerini sağlar.

source/zh-CN/0.3.0/index.html.haml

@@ -17,9 +17,8 @@ version: 0.3.0
   这个列表记录所有版本的重大变动。
 
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### 为何要提供更新日志？
   为了让用户和开发人员更好知道每一个版本有哪些区别。
 

source/zh-TW/0.3.0/index.html.haml

@@ -17,9 +17,8 @@ version: 0.3.0
   這個列表記錄所有版本的重大變動。
 
 
-%pre.changelog= File.read("CHANGELOG.md")
+  <pre class="changelog">#{File.read("CHANGELOG.md")}</pre>
 
-:markdown
   ### 為何要提供更新日誌？
   為了讓用戶和開發人員更好知道每一個版本有哪些區別。