bug#41905: Small change: In Customize, display name with with spaces, but keep symbol name underneath.

[Lars Ingebrigtsen]

After all that work, I think we'll have to revert this, anyway.  The
string returned here isn't just used in the buffers themselves, but also
in the buffer names, so this fails:

(ert-deftest so-long-tests-customize ()
  "Test the `so-long-customize' command."
  (so-long-customize)
  (should (string= (buffer-name) "*Customize Group: So Long*")))

*sigh*

Or...  we could work some more on this to fix these use cases.

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   bloggy blog: http://lars.ingebrigtsen.no