Fix Create new member record preview: formatting is off (eclipse-jdt#2184)

Two superflous newlines (`<br>`) where causing the bold
font styling to be place on the wrong chars.

fixes eclipse-jdt#2183

Author: fapdash

org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/proposals/NewCUUsingWizardProposal.java

@@ -512,6 +512,7 @@ private ITypeBinding getPossibleSuperTypeBinding(ASTNode node) {
 	@Override
 	public Object getAdditionalProposalInfo(IProgressMonitor monitor) {
 		StringBuilder buf= new StringBuilder();
+		boolean noSpacingNeeded = false;
 		switch (fTypeKind) {
 			case K_CLASS:
 				buf.append(CorrectionMessages.NewCUCompletionUsingWizardProposal_createclass_info);
@@ -525,9 +526,14 @@ public Object getAdditionalProposalInfo(IProgressMonitor monitor) {
 			case K_ANNOTATION:
 				buf.append(CorrectionMessages.NewCUCompletionUsingWizardProposal_createannotation_info);
 				break;
+			default:
+				noSpacingNeeded = true;
+		}
+		// #2183: newlines at the start of the preview String mess with the formatting
+		if (!noSpacingNeeded) {
+			buf.append("<br>"); //$NON-NLS-1$
+			buf.append("<br>"); //$NON-NLS-1$
 		}
-		buf.append("<br>"); //$NON-NLS-1$
-		buf.append("<br>"); //$NON-NLS-1$
 		if (fTypeContainer instanceof IType) {
 			buf.append(CorrectionMessages.NewCUCompletionUsingWizardProposal_tooltip_enclosingtype);
 		} else {