Do not ever allow using the full line in preprocessor directives.

We would format:
  #define A \
    int f(a); int i;
as
  #define A \
    int f(a);\
    int i

The fix will break up macro definitions that could fit a line, but hit
the last column; fixing that is more involved, though, as it requires
looking at the following line.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@171715 91177308-0d34-0410-b5e6-96231b3b80d8
Remove outdated fixme.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@171716 91177308-0d34-0410-b5e6-96231b3b80d8
Remove outdated FIXME and add explanation for error handling strategy
while parsing #define's.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@171717 91177308-0d34-0410-b5e6-96231b3b80d8
CFG.cpp: Fix wrapping logic when printing block preds/succs.

First check only wrapped with i==8, second wrapped at i==2,8,18,28,...
This fix restores the intended behavior: i==8,18,28,...

Found with -fsanitize=integer.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@171718 91177308-0d34-0410-b5e6-96231b3b80d8