Removing some more unnecessary manual quotes from attribute diagnostics.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@198371 91177308-0d34-0410-b5e6-96231b3b80d8
Removing some more unnecessary manual quotes from attribute diagnostics. Updated the associated testcase because QualType pretty printing was an improvement.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@198372 91177308-0d34-0410-b5e6-96231b3b80d8
This diagnostic should not have had the manual quotation marks. Its only usage passed in an Attr object, which was already quoted when printing the diagnostic. However, there was no test case that caught this bug -- one has been added.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@198373 91177308-0d34-0410-b5e6-96231b3b80d8
Removed an unnecessary %select from the alignas diagnostics. The attribute already knows how it was spelled.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@198375 91177308-0d34-0410-b5e6-96231b3b80d8