prefer constant receivers

Author: tomasstupka

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/cext/PythonCextMemoryViewBuiltins.java

@@ -117,7 +117,7 @@ public Object get(VirtualFrame frame, Object obj, int buffertype, int orderInt,
                         return raiseNativeNode.raise(frame, getNativeNullNode.execute(), BufferError, WRITABLE_CONTIGUES_FOR_NON_CONTIGUOUS);
                     }
                     PMemoryView mvBytes = memoryViewFromObject.execute(frame, toBytesNode.execute(frame, mv, Character.toString(order)));
-                    if (mv.getFormatString().equals("B")) {
+                    if ("B".equals(mv.getFormatString())) {
                         return mvBytes;
                     } else {
                         try {

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/statement/AbstractImportNode.java

@@ -88,7 +88,7 @@
 public abstract class AbstractImportNode extends StatementNode {
 
     @CompilationFinal(dimensions = 1) public static final String[] IMPORT_ALL = new String[]{"*"};
-    
+
     @Child ImportName importNameNode;
 
     public AbstractImportNode() {