bug#10150: deactive->inactive, inactivate->deactivate spelling fixes

[Paul Eggert <eggert@cs.ucla.edu>]

On 11/28/11 12:46, Wolfgang Jenkner wrote:
> the Longman Dictionary of the English Language (2nd
> ed. 1991) contains

I stand corrected.

Still, it's confusing that Emacs typically uses "deactivate",
(e.g., deactivate-mark) but sometimes employs "inactivate" instead.
A quick estimation shows that "deactivate" and related forms
are used far more often:

$ cat $(find * -type f) | grep -ci deactivat
815
$ cat $(find * -type f) | grep -ci inactivat
65

Is there some significance to the use of "inactivate" as opposed
to "deactivate"?  If not, it'd be simpler and cleaner for
Emacs to use the more-typical form uniformly.