* fix function parameter comments
* remove space after star in function names

Note: the reason for removing them is not that there after this refactor
is no use of them, but rather that having them available is an
anti-pattern: they manange an _extra_ heap allocation which has
nothing to do with the functionality of the map itself (khash
manages the real buffers internally). In case there happens to
be a reason to allocate the map structure itself later, this
should be made explicit using xcalloc/xfree calls.

If the O_* flags were non-zero, then ORing the flags would always be
true.  However, the O_* flags aren't guaranteed to be non-zero, so the
assert is invalid in the first place.

Problem:    Debugging where a delay comes from is not easy.
Solution:   Use different values when calling ui_delay().
https://github.com/vim/vim/commit/eda1da0c9a8db1400649629117e7d248c07735f7

[skip ci]