diff --git a/source/text.tex b/source/text.tex
index 97cc3873f1..8aaeb5b7c9 100644
--- a/source/text.tex
+++ b/source/text.tex
@@ -10895,27 +10895,27 @@
 \begin{codeblock}
 namespace std {
   template<class BidirectionalIterator>
-    class sub_match : public pair<BidirectionalIterator, BidirectionalIterator> {
-    public:
-      using value_type      = iterator_traits<BidirectionalIterator>::value_type;
-      using difference_type = iterator_traits<BidirectionalIterator>::difference_type;
-      using iterator        = BidirectionalIterator;
-      using string_type     = basic_string<value_type>;
+  class sub_match : public pair<BidirectionalIterator, BidirectionalIterator> {
+  public:
+    using value_type      = iterator_traits<BidirectionalIterator>::value_type;
+    using difference_type = iterator_traits<BidirectionalIterator>::difference_type;
+    using iterator        = BidirectionalIterator;
+    using string_type     = basic_string<value_type>;
 
-      bool matched;
+    bool matched;
 
-      constexpr sub_match();
+    constexpr sub_match();
 
-      difference_type length() const;
-      operator string_type() const;
-      string_type str() const;
+    difference_type length() const;
+    operator string_type() const;
+    string_type str() const;
 
-      int compare(const sub_match& s) const;
-      int compare(const string_type& s) const;
-      int compare(const value_type* s) const;
+    int compare(const sub_match& s) const;
+    int compare(const string_type& s) const;
+    int compare(const value_type* s) const;
 
-      void swap(sub_match& s) noexcept(@\seebelow@);
-    };
+    void swap(sub_match& s) noexcept(@\seebelow@);
+  };
 }
 \end{codeblock}