[analyzer] Per feedback, re-structure the docs for ExprInspection checks.

Also, remove the FIXME about merging -analyzer-stats and the debug.Stats
checker. This would be a bad idea because simply running debug.Stats can
affect the output of -analyzer-stats.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162364 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed