refactor: remove unnecessary reference

`String` can be compared with `&str`

1 files changed, 1 insertions, 1 deletions

diff --git a/src/app.rs b/src/app.rs
index 4543283..4755083 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -339,7 +339,7 @@ pub fn build() -> App<'static, 'static> {
 fn validate_date_argument(arg: String) -> Result<(), String> {
     if arg.starts_with('+') {
         validate_time_format(&arg)
-    } else if &arg == "date" || &arg == "relative" {
+    } else if arg == "date" || arg == "relative" {
         Result::Ok(())
     } else {
         Result::Err("possible values: date, relative, +date-time-format".to_owned())