refactor: simplify explicit ref and deref

Cleans up the syntax a little. Was suggested in the PR review.

Author: ytmimi

src/range.rs

@@ -41,16 +41,16 @@ pub(crate) fn rewrite_range(
         )
     };
 
-    match (lhs.as_ref().map(|x| &**x), rhs.as_ref().map(|x| &**x)) {
+    match (lhs, rhs) {
         (Some(lhs), Some(rhs)) => {
             let sp_delim = if context.config.spaces_around_ranges() {
                 format!(" {delim} ")
             } else {
                 default_sp_delim(Some(lhs), Some(rhs))
             };
             rewrite_pair(
-                &*lhs,
-                &*rhs,
+                lhs,
+                rhs,
                 PairParts::infix(&sp_delim),
                 context,
                 shape,
@@ -63,15 +63,15 @@ pub(crate) fn rewrite_range(
             } else {
                 default_sp_delim(None, Some(rhs))
             };
-            rewrite_unary_prefix(context, &sp_delim, &*rhs, shape)
+            rewrite_unary_prefix(context, &sp_delim, rhs, shape)
         }
         (Some(lhs), None) => {
             let sp_delim = if context.config.spaces_around_ranges() {
                 format!(" {delim}")
             } else {
                 default_sp_delim(Some(lhs), None)
             };
-            rewrite_unary_suffix(context, &sp_delim, &*lhs, shape)
+            rewrite_unary_suffix(context, &sp_delim, lhs, shape)
         }
         (None, None) => Ok(delim.to_owned()),
     }