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Description of problem:

Some hyphens end up as unicode minus sign (\x2d) in systemd journal message:

Device dev-disk-by\x2did-wwn\x2d0xceb4b5944ee25001.device appeared twice with different sysfs paths...

Note that the hyphen as unicode minus appears in only one place, in between the 'by' and the next word, as "id", "path", "uuid".

Version-Release number of selected component (if applicable):

Installed Packages
Name        : systemd
Arch        : x86_64
Version     : 219
Release     : 19.el7
Size        : 21 M
Repo        : installed
From repo   : RHEL-7-RTT

How reproducible:

Consistently, also shown but not remarked on in https://bugzilla.redhat.com/show_bug.cgi?id=1296249.

Steps to Reproduce:
1. You need to generate the error message, probably by messing with multipath.

Actual results:

Unicode character substituted for ASCII dash in warning message.

Expected results:

I would expect all characters to be ASCII.

Additional info:

I think this was introduced recently. I've seen these messages fairly frequently, and I don't remember seeing the unicode character previously.

This is the name of the device unit. It should not look differently.

There is a method unit-name-from_path() which mangles paths, substituting '-'s for '/'s and unicode -'s for '-'s.

Sometimes a path is just a path, sometimes it's considered a name. When it is considered a name it is escaped in this fashion.

So, these by-* paths can be escaped differently or not escaped or converted to names, as the case may be, e.g.:
MESSAGE=found 'b65:96' claiming '/run/udev/links/\x2fdisk\x2fby-id\x2fwwn-0xcc9d60494ee25001', where some '/'s are escaped with unicode '/'s
MESSAGE=LINK 'disk/by-id/ata-WDC_WD10EFRX-68PJCN0_WD-WCC4JLVFF3U9' /usr/lib/udev/rules.d/60-persistent-storage.rules:42, no escaping