clang-format: With ColumnLimit=0, keep short array literals on a line.

Before:
    NSArray* a = [[NSArray alloc] initWithArray:@[
                                                   @"a"
                                                ]
                                      copyItems:YES];

After:
    NSArray* a = [[NSArray alloc] initWithArray:@[ @"a" ]
                                      copyItems:YES];

This fixed llvm.org/PR19080.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@206161 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Improve array literal formatting fix in r206161.

Instead of choosing based on the number of elements, simply respect the
user's choice of where to wrap array literals.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@206162 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Fix incorrect &&-detection in macros.

Before:
  #define A(a, b) (a &&b)

After:
  #define A(a, b) (a && b)

This fixes llvm.org/PR19343.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@206165 91177308-0d34-0410-b5e6-96231b3b80d8