use file!() instead of README.md

src/macros.rs

@@ -14,8 +14,7 @@
 /// use rude::try_log;
 ///
 /// fn main() -> RudeResult<()> {
-///     let path = "README.md";
-///     let readme = try_log!(File::open(path), "Unable to open {}", path);
+///     let file = try_log!(File::open(file!()), "Unable to open {}", file!());
 ///     Ok(())
 /// }
 /// ```
@@ -49,7 +48,7 @@ macro_rules! try_log {
 /// use rude::try_print;
 ///
 /// fn main() -> RudeResult<()> {
-///     let readme = try_print!(File::open(file!()), "Unable to open {}", file!());
+///     let file = try_print!(File::open(file!()), "Unable to open {}", file!());
 ///     Ok(())
 /// }
 /// ```