Okay I have to admit I love this one.
writeln(mul(add(x, 5), 30))
vs.
x.add(5).mul(30).writeln()
Also found in D.
And, frustratingly, did not get past the C++ committee.
writeln(mul(add(x, 5), 30))
vs.
x.add(5).mul(30).writeln()