Fix precondition assertions

Author: sbrannen

spring-orm/src/main/java/org/springframework/orm/jpa/support/InjectionCodeGenerator.java

@@ -53,7 +53,7 @@ class InjectionCodeGenerator {
 
 
 	InjectionCodeGenerator(ClassName targetClassName, RuntimeHints hints) {
-		Assert.notNull(hints, "ClassName must not be null");
+		Assert.notNull(targetClassName, "ClassName must not be null");
 		Assert.notNull(hints, "RuntimeHints must not be null");
 		this.targetClassName = targetClassName;
 		this.hints = hints;

spring-web/src/main/java/org/springframework/http/ContentDisposition.java

@@ -535,8 +535,8 @@ private static boolean isRFC5987AttrChar(byte c) {
 	 * @see <a href="https://tools.ietf.org/html/rfc2047">RFC 2047</a>
 	 */
 	private static String decodeQuotedPrintableFilename(String filename, Charset charset) {
-		Assert.notNull(filename, "'input' String should not be null");
-		Assert.notNull(charset, "'charset' should not be null");
+		Assert.notNull(filename, "'filename' must not be null");
+		Assert.notNull(charset, "'charset' must not be null");
 
 		byte[] value = filename.getBytes(US_ASCII);
 		ByteArrayOutputStream baos = new ByteArrayOutputStream();