String literals,
and optionally char literals.
Escaped tab characters (\t) are not reported, even though escaping them is not required,
because tab characters are hard to tell apart from spaces.
例:
String s = "\'Scare\' quotes";
String t = """
All you need is\n\tLove\n""";
クイックフィックス適用後:
String s = "'Scare' quotes";
String t = """
All you need is
\tLove
""";