Fix bug with range parsing

Fix bug where all ranges with double and triple hyphen had one element.

src/lib.rs

@@ -1242,4 +1242,32 @@ Martin}}"#;
             Err(TypeError::new(74..74, TypeErrorKind::MissingNumber).into())
         );
     }
+
+    #[test]
+    #[allow(clippy::single_range_in_vec_init)]
+    fn test_page_ranges() {
+        let raw = r#"@article{test,
+            pages = {1---2},
+          }
+          @article{test1,
+            pages = {2--3},
+          }
+          @article{test2,
+            pages = {1},
+          }"#;
+
+        let bibliography = Bibliography::parse(raw).unwrap();
+        assert_eq!(
+            bibliography.get("test").unwrap().pages(),
+            Ok(PermissiveType::Typed(vec![1..2]))
+        );
+        assert_eq!(
+            bibliography.get("test1").unwrap().pages(),
+            Ok(PermissiveType::Typed(vec![2..3]))
+        );
+        assert_eq!(
+            bibliography.get("test2").unwrap().pages(),
+            Ok(PermissiveType::Typed(vec![1..1]))
+        );
+    }
 }

src/types/mod.rs

@@ -232,7 +232,10 @@ impl Type for Vec<Range<u32>> {
             let mut s = Scanner::new(&range_candidate);
             let start = component(&mut s, span.start)?;
             s.eat_whitespace();
-            if !s.eat_if('-') {
+
+            // The double and triple hyphen is converted into en dashes and em
+            // dashes earlier.
+            if !s.eat_if(['-', '–', '—']) {
                 res.push(start..start);
                 continue;
             }