Compare latex fragment properties.

src/compare/diff.rs

@@ -3185,10 +3185,21 @@ fn compare_latex_fragment<'b, 's>(
     emacs: &'b Token<'s>,
     rust: &'b LatexFragment<'s>,
 ) -> Result<DiffEntry<'b, 's>, Box<dyn std::error::Error>> {
-    let this_status = DiffStatus::Good;
+    let mut this_status = DiffStatus::Good;
-    let message = None;
+    let mut message = None;
 
-    // TODO: Compare :value
+    if let Some((new_status, new_message)) = compare_properties!(
+        emacs,
+        rust,
+        (
+            EmacsField::Required(":value"),
+            |r| Some(r.value),
+            compare_property_quoted_string
+        )
+    )? {
+        this_status = new_status;
+        message = new_message;
+    }
 
     Ok(DiffResult {
         status: this_status,

src/parser/latex_fragment.rs

@@ -36,6 +36,7 @@ pub(crate) fn latex_fragment<'b, 'g, 'r, 's>(
         parser_with_context!(dollar_char_fragment)(context),
         parser_with_context!(bordered_dollar_fragment)(context),
     ))(input)?;
+    let value = get_consumed(input, remaining);
     let (remaining, _trailing_whitespace) =
         maybe_consume_object_trailing_whitespace_if_not_exiting(context, remaining)?;
     let source = get_consumed(input, remaining);
@@ -43,6 +44,7 @@ pub(crate) fn latex_fragment<'b, 'g, 'r, 's>(
         remaining,
         LatexFragment {
             source: source.into(),
+            value: value.into(),
         },
     ))
 }

src/types/object.rs

@@ -180,6 +180,7 @@ pub struct Entity<'s> {
 #[derive(Debug, PartialEq)]
 pub struct LatexFragment<'s> {
     pub source: &'s str,
+    pub value: &'s str,
 }
 
 #[derive(Debug, PartialEq)]