[gparted] Avoid using += shell variable concatenation in CI test jobs (!104)

[Curtis Gedak <gedakc src gnome org>]

commit 1424b7a5f4bf7c8d551b772d12d2806259ffec20
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Thu Jun 16 13:58:16 2022 +0100

    Avoid using += shell variable concatenation in CI test jobs (!104)
    
    The test CI job on Alpine Linux fails like this:
        $ GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndReadUsage/btrfs'
        /bin/sh: eval: line 135: GTEST_FILTER+=:My/SupportedFileSystemsTest.CreateAndReadUsage/btrfs: not 
found
    
    This is because the busybox ash shell in Alpine Linux doesn't support +=
    syntax for variable concatenation.  Use plain variable assignment
    instead.
    
    Closes !104 - Add Alpine Linux CI jobs and resolve label and UUID issues
                  with FAT16/32

 .gitlab-ci.yml | 48 ++++++++++++++++++++++++------------------------
 1 file changed, 24 insertions(+), 24 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3f0a1037..7b3c8613 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -78,30 +78,30 @@ stages:
     - make -j $nproc
     # Exclude specific unit tests which fail without being able to create
     # loop devices in Docker images.
-    - export GTEST_FILTER='-My/SupportedFileSystemsTest.Create/lvm2pv'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndReadUsage/btrfs'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndReadUsage/lvm2pv'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndReadUsage/nilfs2'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndReadLabel/btrfs'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndReadLabel/lvm2pv'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndReadLabel/nilfs2'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndReadUUID/btrfs'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndReadUUID/lvm2pv'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndReadUUID/nilfs2'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndWriteLabel/lvm2pv'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndWriteLabel/nilfs2'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndWriteUUID/lvm2pv'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndWriteUUID/nilfs2'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndCheck/lvm2pv'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndRemove/lvm2pv'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndGrow/btrfs'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndGrow/jfs'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndGrow/lvm2pv'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndGrow/nilfs2'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndGrow/xfs'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndShrink/btrfs'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndShrink/lvm2pv'
-    - GTEST_FILTER+=':My/SupportedFileSystemsTest.CreateAndShrink/nilfs2'
+    - export GTEST_FILTER="-My/SupportedFileSystemsTest.Create/lvm2pv"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndReadUsage/btrfs"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndReadUsage/lvm2pv"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndReadUsage/nilfs2"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndReadLabel/btrfs"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndReadLabel/lvm2pv"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndReadLabel/nilfs2"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndReadUUID/btrfs"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndReadUUID/lvm2pv"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndReadUUID/nilfs2"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndWriteLabel/lvm2pv"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndWriteLabel/nilfs2"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndWriteUUID/lvm2pv"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndWriteUUID/nilfs2"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndCheck/lvm2pv"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndRemove/lvm2pv"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndGrow/btrfs"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndGrow/jfs"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndGrow/lvm2pv"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndGrow/nilfs2"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndGrow/xfs"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndShrink/btrfs"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndShrink/lvm2pv"
+    - GTEST_FILTER="$GTEST_FILTER:My/SupportedFileSystemsTest.CreateAndShrink/nilfs2"
     - fgrep -v nodev /proc/filesystems | sort
     # Create needed /dev entries for unit tests in Docker images.
     - tests/makedev.sh