Use slice::iter instead of into_iter to avoid future breakage

`an_array.into_iter()` currently just works because of the autoref
feature, which then calls `<[T] as IntoIterator>::into_iter`. But
in the future, arrays will implement `IntoIterator`, too. In order
to avoid problems in the future, the call is replaced by `iter()`
which is shorter and more explicit.

Author: TethysSvensson

typed-html/src/types/spacedlist.rs

@@ -245,7 +245,7 @@ macro_rules! spacedlist_from_array {
         {
             type Error = <A as FromStr>::Err;
             fn try_from(s: [&str; $num]) -> Result<Self, Self::Error> {
-                s.into_iter().map(|s| FromStr::from_str(*s)).collect()
+                s.iter().map(|s| FromStr::from_str(*s)).collect()
             }
         }
     };

typed-html/src/types/spacedset.rs

@@ -272,7 +272,7 @@ macro_rules! spacedset_from_array {
         {
             type Error = <A as FromStr>::Err;
             fn try_from(s: [&str; $num]) -> Result<Self, Self::Error> {
-                s.into_iter().map(|s| FromStr::from_str(*s)).collect()
+                s.iter().map(|s| FromStr::from_str(*s)).collect()
             }
         }
     };