clippy: fix issues found by newest clippy

Author: mathstuf

graphql_client_codegen/src/enums.rs

@@ -62,7 +62,7 @@ impl<'schema> GqlEnum<'schema> {
         let variant_str: Vec<&str> = self.variants.iter().map(|v| v.name).collect();
         let variant_str = &variant_str;
 
-        let name = name_ident.clone();
+        let name = name_ident;
 
         quote! {
             #derives

graphql_client_codegen/src/lib.rs

@@ -104,7 +104,7 @@ pub fn generate_module_token_stream(
             hash_map::Entry::Occupied(o) => o.get().clone(),
             hash_map::Entry::Vacant(v) => {
                 let schema_string = read_file(v.key())?;
-                v.insert(schema_string).to_string()
+                (*v.insert(schema_string)).to_string()
             }
         }
     };

graphql_client_codegen/src/unions.rs

@@ -75,7 +75,12 @@ pub(crate) fn union_variants<'selection>(
             Some(Ok(Some(tokens))) => children_definitions.push(tokens),
             Some(Err(err)) => return Err(err),
             Some(Ok(None)) => (),
-            None => return Err(UnionError::UnknownType { ty: on.to_string() }.into()),
+            None => {
+                return Err(UnionError::UnknownType {
+                    ty: (*on).to_string(),
+                }
+                .into())
+            }
         };
 
         variants.push(quote! {
@@ -113,7 +118,7 @@ impl<'schema> GqlUnion<'schema> {
             if !self.variants.contains(used_variant) {
                 return Err(UnionError::UnknownVariant {
                     ty: self.name.into(),
-                    var: used_variant.to_string(),
+                    var: (*used_variant).to_string(),
                 }
                 .into());
             }