Bug 20475 Quick fix proposal preview: Bold off by 2 characters
F3 create file class A extends Object1 { } -> Object1 is marked as temporary error, Quick Fix. Select 'Change to Object', look at the preview: The preview shows changes in bold: It is off by 2 charaters: 'ject {' is bold, should be 'Object'. From debugging I see that the resulting html is correct, bug must be in rendering. Look stupid, should be fixed.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/HTML2TextReader.java
/**
	 * @see SubstitutionTextReader#computeSubstitution(char)
	 */
	protected String computeSubstitution(int c) throws IOException {
		if (c == '<')
			return  processHTMLTag();
		else if (c == '&')
			return processEntity();
		
		return null;
	}
	private String html2Text(String html) {
		
		String tag= html;
		if ('/' == tag.charAt(0))
			tag= tag.substring(1);
			
		if (!fgTags.contains(tag))
			return ""; 
		if ("b".equals(html)) { 
			startBold();
			return ""; 
		}
				
		if ("h5".equals(html) || "dt".equals(html)) { 
			startBold();
			return ""; 
		}