Bug 16858 Preceding space in package compression pattern sometimes ignored
(In the following discussion, all patterns were entered without the enclosing quote marks.) The pattern "1 " causes one character of each package name to be displayed with a single space separator between them. The pattern " 1 " causes one space to precede the first single-character package name and two spaces to appear between each one. Both of the above cases were expected. However, if you set the patttern to " 1" (i.e. space before, but no space after), no spaces are displayed in the result.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/viewsupport/JavaElementLabels.java
if (names != null) {
						if (types != null) {
							buf.append(' ');
						}
						buf.append(names[i]);
					}
				}
				buf.append(')');
			}
					
			if (getFlag(flags, M_EXCEPTIONS) && method.exists()) {
				String[] types= method.getExceptionTypes();
				if (types.length > 0) {
					buf.append(" throws "); 
					for (int i= 0; i < types.length; i++) {
						if (i > 0) {
							buf.append(COMMA_STRING);
						}
						buf.append(Signature.getSimpleName(Signature.toString(types[i])));
					}
				}
			}
			
			if (getFlag(flags, M_APP_RETURNTYPE) && method.exists() && !method.isConstructor()) {
				buf.append(DECL_STRING);
				buf.append(Signature.getSimpleName(Signature.toString(method.getReturnType())));	
			}			
			
			
			if (getFlag(flags, M_POST_QUALIFIED)) {