Bug#1152319: brltty: invalid unquoted ENV assignment in Debian udev rules (verified patch)

[Alexander Stepanov]

Package: brltty
Version: 6.9.1+repack-2
Severity: normal
Tags: patch

The Debian packaging source contains an invalid udev ENV assignment in
debian/brltty-udeb.udev.rules at line 611:

  ENV{BRLTTY_GENERIC}=1

systemd-udevd rejects this syntax; the value must be quoted.

Observed environment: Ubuntu/Kubuntu 26.10 (stonking), systemd 261,
brltty 6.9.1+repack-1ubuntu1, Linux 7.3.0-9-generic (amd64).
The Ubuntu binary package installs the affected rule as
/usr/lib/udev/rules.d/85-brltty.rules.

Reproduction:
  udevadm verify /usr/lib/udev/rules.d/85-brltty.rules

Actual result:
  /usr/lib/udev/rules.d/85-brltty.rules:611 Invalid key/value pair, ignoring.
  /usr/lib/udev/rules.d/85-brltty.rules: udev rules check failed.
  1 udev rules files have been checked.
    Success: 0
    Fail:    1

The same problem was independently reproduced with the source archive
brltty_6.9.1+repack-2.debian.tar.xz retrieved from deb.debian.org.
The bad assignment is present at the same line in
debian/brltty-udeb.udev.rules.

Proposed patch:

--- a/debian/brltty-udeb.udev.rules
+++ b/debian/brltty-udeb.udev.rules
@@ -608,7 +608,7 @@

 # A generic-model USB device was detected
 LABEL="brltty_generic_usb_run"
-ENV{BRLTTY_GENERIC}=1
+ENV{BRLTTY_GENERIC}="1"
 GOTO="brltty_usb_run"

 LABEL="brltty_usb_run"

Regression verification (both against isolated temporary copies):
  Installed Ubuntu rule, original: Fail: 1, patched: Success: 1, Fail: 0.
  Debian source rule, original:    Fail: 1, patched: Success: 1, Fail: 0.

The production rule was not modified; no udev reload or braille hardware
operation was performed. This validates syntax, not end-to-end device behavior.
The upstream BRLTTY template Autostart/Udev/usb-template.rules.in does not
contain this Debian-specific generic-device stanza.

Please review and include this minimal fix in Debian packaging, so it can
also be picked up by Ubuntu. Thank you.

Reported with AI assistance; reproducer, source match and before/after
validation were checked directly.