diff --git a/src/intermediate/full_lines_iterator.rs b/src/intermediate/full_lines_iterator.rs
new file mode 100644
index 0000000..d03003e
--- /dev/null
+++ b/src/intermediate/full_lines_iterator.rs
@@ -0,0 +1,125 @@
+pub(crate) struct FullLinesIterator<'i> {
+    inner: Option<&'i str>,
+}
+
+impl<'i> Iterator for FullLinesIterator<'i> {
+    type Item = &'i str;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        if let Some(inner) = self.inner {
+            for (i, c) in inner.char_indices() {
+                if c == '\n' {
+                    let (current_line, remainder) = inner.split_at(i + 1);
+                    self.inner = Some(remainder);
+                    return Some(current_line);
+                }
+            }
+            if inner.is_empty() {
+                None
+            } else {
+                let final_unterminated_line = Some(inner);
+                self.inner = None;
+                final_unterminated_line
+            }
+        } else {
+            None
+        }
+    }
+
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        if let Some(inner) = self.inner {
+            let line_count = {
+                inner.bytes().filter(|b| *b == b'\n').count()
+                    + (if inner.ends_with('\n') { 0 } else { 1 })
+            };
+            (line_count, Some(line_count))
+        } else {
+            (0, Some(0))
+        }
+    }
+}
+
+impl ExactSizeIterator for FullLinesIterator<'_> {}
+
+pub(crate) trait GetFullLines {
+    fn full_lines(&self) -> FullLinesIterator<'_>;
+}
+
+impl<'s, S: AsRef<str>> GetFullLines for S {
+    fn full_lines(&self) -> FullLinesIterator<'_> {
+        let inner = self.as_ref();
+        FullLinesIterator {
+            inner: if inner.is_empty() { None } else { Some(inner) },
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_full_lines_iterator() {
+        {
+            let input = "foo\nbar\nbaz";
+            assert_eq!(input.lines().count(), input.full_lines().count());
+            assert_eq!(input.lines().count(), input.full_lines().len());
+            assert_eq!(input.lines().collect::<Vec<_>>(), vec!["foo", "bar", "baz"]);
+            assert_eq!(
+                input.full_lines().collect::<Vec<_>>(),
+                vec!["foo\n", "bar\n", "baz"]
+            );
+        }
+
+        {
+            // Trailing newline
+            let input = "foo\nbar\nbaz\n";
+            assert_eq!(input.lines().count(), input.full_lines().count());
+            assert_eq!(input.lines().count(), input.full_lines().len());
+            assert_eq!(input.lines().collect::<Vec<_>>(), vec!["foo", "bar", "baz"]);
+            assert_eq!(
+                input.full_lines().collect::<Vec<_>>(),
+                vec!["foo\n", "bar\n", "baz\n"]
+            );
+        }
+
+        {
+            // Leading newline
+            let input = "\nfoo\nbar\nbaz";
+            assert_eq!(input.lines().count(), input.full_lines().count());
+            assert_eq!(input.lines().count(), input.full_lines().len());
+            assert_eq!(
+                input.lines().collect::<Vec<_>>(),
+                vec!["", "foo", "bar", "baz"]
+            );
+            assert_eq!(
+                input.full_lines().collect::<Vec<_>>(),
+                vec!["\n", "foo\n", "bar\n", "baz"]
+            );
+        }
+
+        {
+            // Double newline
+            let input = "foo\nbar\n\nbaz";
+            assert_eq!(input.lines().count(), input.full_lines().count());
+            assert_eq!(input.lines().count(), input.full_lines().len());
+            assert_eq!(
+                input.lines().collect::<Vec<_>>(),
+                vec!["foo", "bar", "", "baz"]
+            );
+            assert_eq!(
+                input.full_lines().collect::<Vec<_>>(),
+                vec!["foo\n", "bar\n", "\n", "baz"]
+            );
+        }
+
+        {
+            // Empty
+            let input = "";
+            assert_eq!(input.lines().count(), input.full_lines().count());
+            assert_eq!(input.lines().count(), input.full_lines().len());
+            assert_eq!(input.lines().collect::<Vec<_>>(), Vec::<&str>::new());
+            assert_eq!(input.full_lines().collect::<Vec<_>>(), Vec::<&str>::new());
+        }
+    }
+}
diff --git a/src/intermediate/mod.rs b/src/intermediate/mod.rs
index ac1f411..0c41982 100644
--- a/src/intermediate/mod.rs
+++ b/src/intermediate/mod.rs
@@ -22,6 +22,7 @@ mod export_snippet;
 mod fixed_width_area;
 mod footnote_definition;
 mod footnote_reference;
+mod full_lines_iterator;
 mod heading;
 mod horizontal_rule;
 mod inline_babel_call;
diff --git a/src/intermediate/src_block.rs b/src/intermediate/src_block.rs
index 9577179..c694ce8 100644
--- a/src/intermediate/src_block.rs
+++ b/src/intermediate/src_block.rs
@@ -1,7 +1,7 @@
 use crate::error::CustomError;
 
+use super::full_lines_iterator::GetFullLines;
 use super::registry::Registry;
-use super::util::GetFullLines;
 
 #[derive(Debug)]
 pub(crate) struct ISrcBlock {
diff --git a/src/intermediate/util.rs b/src/intermediate/util.rs
index f2718dc..b482b98 100644
--- a/src/intermediate/util.rs
+++ b/src/intermediate/util.rs
@@ -46,129 +46,3 @@ enum CoalesceWhitespace {
     Normal,
     HasWhitespace { in_whitespace: bool, ret: String },
 }
-
-pub(crate) struct FullLinesIterator<'i> {
-    inner: Option<&'i str>,
-}
-
-impl<'i> Iterator for FullLinesIterator<'i> {
-    type Item = &'i str;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        if let Some(inner) = self.inner {
-            for (i, c) in inner.char_indices() {
-                if c == '\n' {
-                    let (current_line, remainder) = inner.split_at(i + 1);
-                    self.inner = Some(remainder);
-                    return Some(current_line);
-                }
-            }
-            if inner.is_empty() {
-                None
-            } else {
-                let final_unterminated_line = Some(inner);
-                self.inner = None;
-                final_unterminated_line
-            }
-        } else {
-            None
-        }
-    }
-
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        if let Some(inner) = self.inner {
-            let line_count = {
-                inner.bytes().filter(|b| *b == b'\n').count()
-                    + (if inner.ends_with('\n') { 0 } else { 1 })
-            };
-            (line_count, Some(line_count))
-        } else {
-            (0, Some(0))
-        }
-    }
-}
-
-impl ExactSizeIterator for FullLinesIterator<'_> {}
-
-pub(crate) trait GetFullLines {
-    fn full_lines(&self) -> FullLinesIterator<'_>;
-}
-
-impl<'s, S: AsRef<str>> GetFullLines for S {
-    fn full_lines(&self) -> FullLinesIterator<'_> {
-        let inner = self.as_ref();
-        FullLinesIterator {
-            inner: if inner.is_empty() { None } else { Some(inner) },
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_full_lines_iterator() {
-        {
-            let input = "foo\nbar\nbaz";
-            assert_eq!(input.lines().count(), input.full_lines().count());
-            assert_eq!(input.lines().count(), input.full_lines().len());
-            assert_eq!(input.lines().collect::<Vec<_>>(), vec!["foo", "bar", "baz"]);
-            assert_eq!(
-                input.full_lines().collect::<Vec<_>>(),
-                vec!["foo\n", "bar\n", "baz"]
-            );
-        }
-
-        {
-            // Trailing newline
-            let input = "foo\nbar\nbaz\n";
-            assert_eq!(input.lines().count(), input.full_lines().count());
-            assert_eq!(input.lines().count(), input.full_lines().len());
-            assert_eq!(input.lines().collect::<Vec<_>>(), vec!["foo", "bar", "baz"]);
-            assert_eq!(
-                input.full_lines().collect::<Vec<_>>(),
-                vec!["foo\n", "bar\n", "baz\n"]
-            );
-        }
-
-        {
-            // Leading newline
-            let input = "\nfoo\nbar\nbaz";
-            assert_eq!(input.lines().count(), input.full_lines().count());
-            assert_eq!(input.lines().count(), input.full_lines().len());
-            assert_eq!(
-                input.lines().collect::<Vec<_>>(),
-                vec!["", "foo", "bar", "baz"]
-            );
-            assert_eq!(
-                input.full_lines().collect::<Vec<_>>(),
-                vec!["\n", "foo\n", "bar\n", "baz"]
-            );
-        }
-
-        {
-            // Double newline
-            let input = "foo\nbar\n\nbaz";
-            assert_eq!(input.lines().count(), input.full_lines().count());
-            assert_eq!(input.lines().count(), input.full_lines().len());
-            assert_eq!(
-                input.lines().collect::<Vec<_>>(),
-                vec!["foo", "bar", "", "baz"]
-            );
-            assert_eq!(
-                input.full_lines().collect::<Vec<_>>(),
-                vec!["foo\n", "bar\n", "\n", "baz"]
-            );
-        }
-
-        {
-            // Empty
-            let input = "";
-            assert_eq!(input.lines().count(), input.full_lines().count());
-            assert_eq!(input.lines().count(), input.full_lines().len());
-            assert_eq!(input.lines().collect::<Vec<_>>(), Vec::<&str>::new());
-            assert_eq!(input.full_lines().collect::<Vec<_>>(), Vec::<&str>::new());
-        }
-    }
-}