Fix style

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/tuple/StructSequence.java

@@ -170,10 +170,12 @@ String[] getFieldsForRepr() {
 
         @Override
         public boolean equals(Object o) {
-            if (this == o)
+            if (this == o) {
                 return true;
-            if (!(o instanceof Descriptor))
+            }
+            if (!(o instanceof Descriptor)) {
                 return false;
+            }
             Descriptor that = (Descriptor) o;
             return inSequence == that.inSequence && allowInstances == that.allowInstances && Objects.equals(docString, that.docString) && Arrays.equals(fieldNames, that.fieldNames) &&
                             Arrays.equals(fieldDocStrings, that.fieldDocStrings);

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/attributes/WriteAttributeToObjectNode.java

@@ -66,7 +66,6 @@
 import com.oracle.truffle.api.CompilerDirectives;
 import com.oracle.truffle.api.TruffleLanguage.ContextReference;
 import com.oracle.truffle.api.dsl.Cached;
-import com.oracle.truffle.api.dsl.Cached.Exclusive;
 import com.oracle.truffle.api.dsl.Cached.Shared;
 import com.oracle.truffle.api.dsl.CachedContext;
 import com.oracle.truffle.api.dsl.GenerateUncached;