// into a constant. E.g:
				//   BC 4,...
				// into
				//   BC $4,...
				prog.From = obj.Addr{
					Type:   obj.TYPE_CONST,
					Offset: p.getConstant(prog, op, &a[0]),
				}

			}

			// Likewise, fixup usage like:
			//   BC x,LT,...
			//   BC x,foo+2,...
			//   BC x,4
			//   BC x,$5
			// into
			//   BC x,CR0LT,...
			//   BC x,CR0EQ,...
			//   BC x,CR1LT,...

    InterruptibleTask<String> task =
        new InterruptibleTask<String>() {
          @Override
          String runInterruptibly() throws Exception {
            BrokenChannel bc = new BrokenChannel();
            bc.doBegin();
            isInterruptibleRegistered.countDown();
            new CountDownLatch(1).await(); // the interrupt will wake us up
            return "impossible!";
          }

    InterruptibleTask<String> task =
        new InterruptibleTask<String>() {
          @Override
          String runInterruptibly() throws Exception {
            BrokenChannel bc = new BrokenChannel();
            bc.doBegin();
            isInterruptibleRegistered.countDown();
            new CountDownLatch(1).await(); // the interrupt will wake us up
            return "impossible!";
          }

    //     [abc]de|[fgh] -> [fgh]de|[abc]. Now [fgh] is in the right place, but we need to swap [de]
    //     with [abc]: fgh[de]|a[bc] -> fgh[bc]|a[de]. Now we need to swap [a] with [bc]:
    //     fgh[b]c|[a]de -> fgh[a]c|[b]de. Finally we need to swap [c] with [b]:
    //     fgha[c]|[b]de -> fgha[b]|[c]de. Because these two blocks are the same size, we are done.

    public void testConfigInterpolation() throws IOException {
        String config = "a=$\\\\\\\\{var}\n" + "ab=${a}b\n" + "abc=${ab}c";
        Map<String, String> expected = Map.of("a", "$\\{var}", "ab", "$\\{var}b", "abc", "$\\{var}bc");

        java.util.Properties props1 = new java.util.Properties();
        props1.load(new StringReader(config));
        new DefaultInterpolator().performSubstitution((Map) props1, null, true);

		}
	}
}

var cutTests = []struct {
	s, sep        string
	before, after string
	found         bool
}{
	{"abc", "b", "a", "c", true},
	{"abc", "a", "", "bc", true},
	{"abc", "c", "ab", "", true},
	{"abc", "abc", "", "", true},
	{"abc", "", "", "abc", true},
	{"abc", "d", "abc", "", false},
	{"", "d", "", "", false},
	{"", "", "", "", true},
}

				"application/vnd.etsi.cug+xml",
				"application/vnd.etsi.iptvcommand+xml",
				"application/vnd.etsi.iptvdiscovery+xml",
				"application/vnd.etsi.iptvprofile+xml",
				"application/vnd.etsi.iptvsad-bc+xml",
				"application/vnd.etsi.iptvsad-cod+xml",
				"application/vnd.etsi.iptvsad-npvr+xml",
				"application/vnd.etsi.iptvueprofile+xml",
				"application/vnd.etsi.mcid+xml",
				"application/vnd.etsi.sci+xml",