Add CI runner (#5)

Reviewed-on: #5
Co-authored-by: Igor Ranieri <igor@elland.me>
Co-committed-by: Igor Ranieri <igor@elland.me>

src/Types.hs

@@ -9,6 +9,8 @@ module Types (
 )
 where
 
+import Data.Foldable (fold)
+
 newtype Document = Document
   { meta :: Meta
   }
@@ -28,6 +30,7 @@ data Since = Since
 
 -- Could have a better type?
 type Version = [Int]
+
 type Package = String
 
 data DocMarkup mod id
@@ -51,78 +54,78 @@ data DocMarkup mod id
   | -- | Bold __bold text__
     DocBold (DocMarkup mod id)
   | {- | Unordered lists
-      * this
-      or
-      - this
+     * this
+     or
+     - this
     -}
     DocUnorderedList [DocMarkup mod id]
   | {- | Ordered lists
-      1. this
-      or
-      (1) this
+     1. this
+     or
+     (1) this
     -}
     DocOrderedList [(Int, DocMarkup mod id)]
   | {- | Definition lists
-      [term] a term
-      [another term] another definition
+     [term] a term
+     [another term] another definition
     -}
     DocDefinitionList [(DocMarkup mod id, DocMarkup mod id)]
   | {- | Code blocks
-      @
-      a code block in here
-      with multiple lines
-      @
+     @
+     a code block in here
+     with multiple lines
+     @
 
-      Or with bird tracks:
-      > some code
-      > goes here
+     Or with bird tracks:
+     > some code
+     > goes here
     -}
     DocCodeBlock (DocMarkup mod id)
   | {- | Hyperlinks
-      __marked__:
-      <http://example.com>
-      <http://example.com label text>
-      __Auto-detected URLs__:
-      http://example.com
-      https://example.com
-      ftp://example.com
-      __Markdown style__
-      [link text](http://example.com)
-      [link text]("Module.Name")
+     __marked__:
+     <http://example.com>
+     <http://example.com label text>
+     __Auto-detected URLs__:
+     http://example.com
+     https://example.com
+     ftp://example.com
+     __Markdown style__
+     [link text](http://example.com)
+     [link text]("Module.Name")
     -}
     DocHyperlink (Hyperlink (DocMarkup mod id))
   | {- | Pictures
-        <<image.png>>
-        <<image.png title text>>
+       <<image.png>>
+       <<image.png title text>>
 
-        __Markdown Images__
+       __Markdown Images__
 
-        ![alt text](image.png)
+       ![alt text](image.png)
     -}
     DocPicture Picture
   | {- | Inline math expressions
-      \(mathematical expression\)
+     \(mathematical expression\)
     -}
     DocMathInline String
   | {- | Math multiline display
-      \[
-      mathematical expression
-      in multiple lines
-      \]
+     \[
+     mathematical expression
+     in multiple lines
+     \]
     -}
     DocMathDisplay String
   | {- | Anchors, no spaces allowed
-      #anchor-name#
+     #anchor-name#
     -}
     DocAnchor String
   | {- | Property descriptions
-      prop> property description
+     prop> property description
     -}
     DocProperty String
   | {- | Examples
-      >>> expression
-      result line 1
-      result line 2
+     >>> expression
+     result line 1
+     result line 2
     -}
     DocExamples [Example]
   | -- | Header
@@ -136,7 +139,7 @@ instance Semigroup (DocMarkup mod id) where
 
 instance Monoid (DocMarkup mod id) where
   mempty = DocEmpty
-  mconcat = foldr (<>) mempty
+  mconcat = fold
 
 data ModuleLink id = ModuleLink
   { name :: String