diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 0000000..f70a7a2
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1,2 @@
+# Fourmolu
+9998ac92263127b05fd1eb607f3b7740c69d3a58
diff --git a/fourmolu.yaml b/fourmolu.yaml
new file mode 100644
index 0000000..acded78
--- /dev/null
+++ b/fourmolu.yaml
@@ -0,0 +1,72 @@
+# Number of spaces per indentation step
+indentation: 2
+
+# Max line length for automatic line breaking
+column-limit: none
+
+# Styling of arrows in type signatures (choices: trailing, leading, or leading-args)
+function-arrows: trailing
+
+# How to place commas in multi-line lists, records, etc. (choices: leading or trailing)
+comma-style: leading
+
+# Styling of import/export lists (choices: leading, trailing, or diff-friendly)
+import-export-style: diff-friendly
+
+# Rules for grouping import declarations
+import-grouping: legacy
+
+# Whether to full-indent or half-indent 'where' bindings past the preceding body
+indent-wheres: false
+
+# Whether to leave a space before an opening record brace
+record-brace-space: false
+
+# Number of spaces between top-level declarations
+newlines-between-decls: 1
+
+# How to print Haddock comments (choices: single-line, multi-line, or multi-line-compact)
+haddock-style: multi-line
+
+# How to print module docstring
+haddock-style-module: null
+
+# Styling of let blocks (choices: auto, inline, newline, or mixed)
+let-style: auto
+
+# How to align the 'in' keyword with respect to the 'let' keyword (choices: left-align, right-align, or no-space)
+in-style: right-align
+
+# Whether to put parentheses around a single constraint (choices: auto, always, or never)
+single-constraint-parens: always
+
+# Whether to put parentheses around a single deriving class (choices: auto, always, or never)
+single-deriving-parens: always
+
+# Whether to sort constraints
+sort-constraints: false
+
+# Whether to sort derived classes
+sort-derived-classes: false
+
+# Whether to sort deriving clauses
+sort-deriving-clauses: false
+
+# Whether to place section operators (those that are infixr 0, such as $) in trailing position, continuing the expression indented below
+trailing-section-operators: true
+
+# Output Unicode syntax (choices: detect, always, or never)
+unicode: never
+
+# Give the programmer more choice on where to insert blank lines
+respectful: true
+
+# Fixity information for operators
+fixities: []
+
+# Module reexports Fourmolu should know about
+reexports: []
+
+# Modules defined by the current Cabal package for import grouping
+local-modules: []
+
diff --git a/src/Types.hs b/src/Types.hs
index 615c401..a41e38b 100644
--- a/src/Types.hs
+++ b/src/Types.hs
@@ -105,10 +105,10 @@ data DocMarkup mod id
     -}
     DocMathInline String
   | {- | Math multiline display
-    \[
+      \[
       mathematical expression
       in multiple lines
-    \]
+      \]
     -}
     DocMathDisplay String
   | {- | Anchors, no spaces allowed