Change printf to use System.out instead of System.err

It seems to be an overkiil to log such problems as errors.

Signed-off-by: Rulle IO <[email protected]>

Author: rulle-io

runtime/Java/src/org/antlr/v4/runtime/RuntimeMetaData.java

@@ -157,11 +157,11 @@ public static void checkVersion(String generatingToolVersion, String compileTime
 			!getMajorMinorVersion(runtimeVersion).equals(getMajorMinorVersion(compileTimeVersion));
 
 		if ( runtimeConflictsWithGeneratingTool ) {
-			System.err.printf("ANTLR Tool version %s used for code generation does not match the current runtime version %s%n",
+			System.out.printf("ANTLR Tool version %s used for code generation does not match the current runtime version %s%n",
 							  generatingToolVersion, runtimeVersion);
 		}
 		if ( runtimeConflictsWithCompileTimeTool ) {
-			System.err.printf("ANTLR Runtime version %s used for parser compilation does not match the current runtime version %s%n",
+			System.out.printf("ANTLR Runtime version %s used for parser compilation does not match the current runtime version %s%n",
 							  compileTimeVersion, runtimeVersion);
 		}
 	}