oh right this was supposed to be http

src/line.rs

@@ -37,8 +37,33 @@ impl Line {
         self.0
     }
 
+    #[cfg(target_pointer_width = "64")]
+    pub const fn index_usize(self) -> usize {
+        self.0 as usize
+    }
+
     /// 1-indexed
     pub const fn linenr(self) -> u64 {
         self.0 + 1
     }
 }
+
+/// [Alternate](Formatter::alternate) flag capitalizes "line".
+///
+/// ```
+/// # use dynix::Line;
+/// let line = Line::from_index(22);
+/// assert_eq!(format!("{line}"), "line 23");
+/// assert_eq!(format!("{line:#}"), "Line 23");
+/// ```
+impl Display for Line {
+    fn fmt(&self, f: &mut Formatter) -> FmtResult {
+        if f.alternate() {
+            write!(f, "Line {}", self.linenr())?;
+        } else {
+            write!(f, "line {}", self.linenr())?;
+        }
+
+        Ok(())
+    }
+}