bug#17559: 24.3.50; Partial completion does not complete underscore delimited input

[Andreas Politz]

The documentation for the customizable variable
`completion-pcm-word-delimiters' states:
``"A string of characters treated as word delimiters for completion.''

The default value contains _ , yet it does not seem to work, i.e.

(let ((completion-styles '(partial)))
  (completion-initials-all-completions "fdh" '("friss_die_haelfte") nil 0))
=> nil
(let ((completion-styles '(partial)))
  (completion-initials-all-completions "fdh" '("friss-die-haelfte") nil 0))
=> ("friss-die-haelfte" . 0)

It would be nice for c-mode, if this could be made working.

Grüße,

A. Politz