It's previous default was c-lineup-inexpr-block. This change is mainly to
prevent excessive indentation of the innards of C++ lambda functions.
* lisp/progmodes/cc-vars.el (c-offsets-alist): Amend the offset for inlambda
to 0.
* doc/misc/cc-mode.texi (FAQ): Amend the answer to the question about this
matter.