Michael Matz 3e77bfb6e9 tccpp: Fix token pasting
See testcase.  We must always paste tokens (at least if not
currently substing a normal argument, which is a speed optimization
only now) but at the same time must not regard a ## token
coming from argument expansion as the token-paste operator, nor
if we constructed a ## token due to pasting itself (that was already
checked by pp/01.c).
2016-12-15 17:49:56 +01:00
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