https://gitlab.com/sane-project/backends/-/merge_requests/541

--- sane-backends-1.0.31/testsuite/tools/data/udev+acl.ref
+++ sane-backends-1.0.31/testsuite/tools/data/udev+acl.ref
@@ -23,7 +23,7 @@
 # If the scanner is supported by sane-backends, please mail the entry to
 # the sane-devel mailing list (sane-devel@alioth-lists.debian.net).
 #
-ACTION!="add", GOTO="libsane_rules_end"
+ACTION=="remove", GOTO="libsane_rules_end"
 ENV{DEVTYPE}=="usb_device", GOTO="libsane_create_usb_dev"
 SUBSYSTEMS=="scsi", GOTO="libsane_scsi_rules_begin"
 SUBSYSTEM=="usb_device", GOTO="libsane_usb_rules_begin"
--- sane-backends-1.0.31/testsuite/tools/data/udev+hwdb.ref
+++ sane-backends-1.0.31/testsuite/tools/data/udev+hwdb.ref
@@ -20,7 +20,7 @@
 # If the scanner is supported by sane-backends, please mail the entry to
 # the sane-devel mailing list (sane-devel@alioth-lists.debian.net).
 #
-ACTION!="add", GOTO="libsane_rules_end"
+ACTION=="remove", GOTO="libsane_rules_end"
 
 # The following rule will disable USB autosuspend for the device
 ENV{DEVTYPE}=="usb_device", ENV{libsane_matched}=="yes", TEST=="power/control", ATTR{power/control}="on"
--- sane-backends-1.0.31/testsuite/tools/data/udev.ref
+++ sane-backends-1.0.31/testsuite/tools/data/udev.ref
@@ -23,7 +23,7 @@
 # If the scanner is supported by sane-backends, please mail the entry to
 # the sane-devel mailing list (sane-devel@alioth-lists.debian.net).
 #
-ACTION!="add", GOTO="libsane_rules_end"
+ACTION=="remove", GOTO="libsane_rules_end"
 ENV{DEVTYPE}=="usb_device", GOTO="libsane_create_usb_dev"
 SUBSYSTEMS=="scsi", GOTO="libsane_scsi_rules_begin"
 SUBSYSTEM=="usb_device", GOTO="libsane_usb_rules_begin"
--- sane-backends-1.0.31/tools/sane-desc.c
+++ sane-backends-1.0.31/tools/sane-desc.c
@@ -3496,7 +3496,7 @@
   int i;
 
   print_udev_header ();
-  printf("ACTION!=\"add\", GOTO=\"libsane_rules_end\"\n"
+  printf("ACTION==\"remove\", GOTO=\"libsane_rules_end\"\n"
 	 "ENV{DEVTYPE}==\"usb_device\", GOTO=\"libsane_create_usb_dev\"\n"
 	 "SUBSYSTEMS==\"scsi\", GOTO=\"libsane_scsi_rules_begin\"\n"
 	 "SUBSYSTEM==\"usb_device\", GOTO=\"libsane_usb_rules_begin\"\n"
@@ -3679,7 +3679,7 @@
   int i;
 
   print_udevhwdb_header ();
-  printf("ACTION!=\"add\", GOTO=\"libsane_rules_end\"\n\n");
+  printf("ACTION==\"remove\", GOTO=\"libsane_rules_end\"\n\n");
 
   printf("# The following rule will disable USB autosuspend for the device\n");
   printf("ENV{DEVTYPE}==\"usb_device\", ENV{libsane_matched}==\"yes\", TEST==\"power/control\", ATTR{power/control}=\"on\"\n\n");