Wrong Output for AllowShortFunctionsOnASingleLine when ColumnLimit changes

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Bugzilla Link	PR36457
Status	NEW
Importance	P enhancement
Reported by	gabyx (gnuetzi@gmail.com)
Reported on	2018-02-20 08:00:30 -0800
Last modified on	2018-02-20 08:01:22 -0800
Version	trunk
Hardware	PC All
CC	djasper@google.com, klimek@google.com, llvm-bugs@lists.llvm.org
Fixed by commit(s)
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Formatting the file with the config below:
----------------
class A{
#ifndef ASD
    A<bool>& GetMask() { return a; }
    const A<bool>& GetMask() const { return a; }
#endif
};
----------------
results in weird behavior when:
ColumnLimit: 0
is changed to
ColumnLimit: 500
which should not make any difference.

ColumnLimit: 0
---------------
class A
{
#ifndef ASD
    A<bool>& GetMask()
    {
        return a;
    }
    const A<bool>& GetMask() const { return a; }
#endif
};
--------------

ColumnLimit: 500
-------------
class A
{
#ifndef ASD
    A<bool>& GetMask() { return a; }
    const A<bool>& GetMask() const { return a; }
#endif
};
------------

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clang-format version 7.0.0 (trunk)