Using Java bindings CssInline.inlineFragment(html, css) returns a single space character if the html fragment begins with whitespace. I suspect this may be related to #388 as they are both returning an empty result.
Version: css-inline-0.20.1-SNAPSHOT.jar
The following returns a single space (' '): CssInline.inlineFragment(" <h1>Hello World!</h1>", "h1 { color: blue; }");
This returns the fragment with the inlined css: CssInline.inlineFragment("<h1>Hello World!</h1>", "h1 { color: blue; }");
The only difference is that the failing case contains leading whitespace.