refactor(input): exec stuffed keys eagerly

Problem:
The Vim "stuff" concept breaks the ability to reason about the call
stack and thus the boundaries of a `CmdAtom`: a stuffed translation ("x"
=> "dl") defers to the main loop. This "continuation" must be modeled in
`CmdAtom`, by checking global flags at undefined times, during undefined
circumstances.

Solution:
- After a stuffed "translation", eagerly execute the stuff buffer
  (`exec_stuffed()`).
- Delete the CmdAtom "continuation" junk.

Note:
- op_colon runs its cmdline "nested", but that's fine because operators
  already nest interactive sessions there (op_change runs edit()), and
  the cmdline is frameless so the operator's frame can own/capture it.

0 files changed, 0 insertions, 0 deletions