ref: update formatting

kernel/include/util/optional.h

@@ -17,7 +17,7 @@ private:
 
     void destroy() {
         if (initialized) {
-            ((T*) buffer)->~T();
+            ((T*)buffer)->~T();
             initialized = false;
         }
     }
@@ -51,23 +51,24 @@ public:
     }
 
     T* operator->() {
-        return (T*) buffer;
+        return (T*)buffer;
     }
 
     T& operator*() {
-        return *((T*) buffer);
+        return *((T*)buffer);
     }
 
     const T* operator->() const {
-        return (const T*) buffer;
+        return (const T*)buffer;
     }
 
     const T& operator*() const {
-        return *((const T*) buffer);
+        return *((const T*)buffer);
     }
 
     optional& operator=(const optional& other) {
-        if (this == &other) return *this;
+        if (this == &other)
+            return *this;
         destroy();
         if (other.initialized) {
             new (buffer) T(*other);
@@ -77,7 +78,8 @@ public:
     }
 
     optional& operator=(optional&& other) noexcept {
-        if (this == &other) return *this;
+        if (this == &other)
+            return *this;
         destroy();
         if (other.initialized) {
             new (buffer) T(move(*other));
@@ -92,11 +94,11 @@ public:
     }
 
     T& value() {
-        return *((T*) buffer);
+        return *((T*)buffer);
     }
 
     const T& value() const {
-        return *((const T*) buffer);
+        return *((const T*)buffer);
     }
 
     template<typename Func, typename... ArgT>
@@ -119,7 +121,7 @@ public:
 
     const T& value_or(const T& default_value) const {
         if (initialized) {
-            return *((const T*) buffer);
+            return *((const T*)buffer);
         } else {
             return default_value;
         }