Bug 14939 Parameter assist highlighting doesn't always match editor
Build 20020426 (M5 patch 1) Type the following in the body of a java method: int[] source, destination; System.arraycopy(source, <cursor> Now hit Ctrl+Space at <cursor>, and hit enter to select the only match in the popup list. Now the "parameter assist" window is supposed to highlight the parameters as they are typed in the editor. Since I have already typed the first parameter before doing code-assist, the highlighting will always be off by one parameter as I type.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/ResultCollector.java
private StringBuffer getMethodDisplayString(char[] declaringTypeName, char[] name, char[][] parameterTypeNames, char[][] parameterNames, char[] returnTypeName) {
		StringBuffer nameBuffer= new StringBuffer();
		nameBuffer.append(name);
		nameBuffer.append('(');
		if (parameterTypeNames != null && parameterTypeNames.length > 0) {
			nameBuffer.append(getParameterSignature(parameterTypeNames, parameterNames));
		}
		nameBuffer.append(')'); 
		if (returnTypeName != null && returnTypeName.length > 0) {
			nameBuffer.append("  "); 
			nameBuffer.append(returnTypeName);
		}
		if (declaringTypeName != null && declaringTypeName.length > 0) {
			nameBuffer.append(" - "); 
			nameBuffer.append(declaringTypeName);
		}
		return nameBuffer;
	}
	protected JavaCompletionProposal createMethodCallCompletion(char[] declaringTypeName, char[] name, char[][] parameterTypeNames, char[][] parameterNames, char[] returnTypeName, char[] completionName, int modifiers, int start, int end, int relevance) {
		ImageDescriptor descriptor= getMemberDescriptor(modifiers);
		StringBuffer nameBuffer= getMethodDisplayString(declaringTypeName, name, parameterTypeNames, parameterNames, returnTypeName);
		return createCompletion(start, end, new String(completionName), descriptor, nameBuffer.toString(), relevance);
	}
	protected JavaCompletionProposal createAnonymousTypeCompletion(char[] declaringTypePackageName, char[] declaringTypeName, char[][] parameterTypeNames, char[][] parameterNames, char[] completionName, int start, int end, int relevance) {
		StringBuffer declTypeBuf= new StringBuffer();
		if (declaringTypePackageName.length > 0) {
			declTypeBuf.append(declaringTypePackageName);
			declTypeBuf.append('.');
		}
		declTypeBuf.append(declaringTypeName);