Evengii or Kostya:

I've gotten feedback from Bruce that it is unclear when one is looking at an allocated-but-unitialized value under ASAN. 

What do you think of adding bullet to the FAQ on https://github.com/google/sanitizers/wiki/AddressSanitizer :

* Q: What do 0xbebebebebebebebe and 0xbebebebe mean?
* A: ASan, by default, writes 0xbe to newly allocated memory (see [malloc_fill_byte](https://github.com/google/sanitizers/wiki/AddressSanitizerFlags#run-time-flags)). 0xbebebebebebebebe is (possibly) a 64-bit value that was allocated but not initialized while 0xbebebebe is (possibly) a 32-bit value that was allocated but not initialized.

I would do a pull request, but I don't think this is possible for GitHub wiki pages, sorry!

done, thanks!

Thanks Kostya!