|  | @@ -32,7 +32,7 @@ public final class StringExpansion {
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			| 32 | 32 |  	public static Result<String, String> unescape(String self) {
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			| 33 | 33 |  	    if (!(self.charAt(0) == self.charAt(self.length() - 1)))
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			| 34 | 34 |  	        throw new AssertionError("Unbalanced quotes");
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			| 35 |  | -	    if (!(self.charAt(0) == '@' && ArrayHelpers.contains(new char[] {'"', '\''}, self.charAt(1)) || ArrayHelpers.contains(new char[] {'"', '\''}, self.charAt(0))))
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			|  | 35 | +	    if (!(self.charAt(0) == '@' && ArrayHelpers.containsChar(new char[] {'"', '\''}, self.charAt(1)) || ArrayHelpers.containsChar(new char[] {'"', '\''}, self.charAt(0))))
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			| 36 | 36 |  	        throw new AssertionError("String is not quoted");
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			| 37 | 37 |  	    if (!(self.length() >= 2))
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			| 38 | 38 |  	        throw new AssertionError("String is not quoted");
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