StringUtils#normalizeSpace normalizeSpace should not replace non-breaking spaces with normal whitespace

As of 3.4 StringUtils#normalizeSpace does not normalize non-breaking whitespace anymore. Therefore it shouldn't replace a non-breaking whitespace white breaking whitespace, but both assertions succeed:

assertEquals("a b", StringUtils.normalizeSpace("a\u00A0b"));
assertEquals("a  b", StringUtils.normalizeSpace("a\u00A0 b"));

source: https://github.com/apache/commons-lang/pull/184