[PULL,47/56] iotests/222: constantly use single quotes for strings

diff --git a/tests/qemu-iotests/222 b/tests/qemu-iotests/222
index 5e2556f8df..799369e290 100755
--- a/tests/qemu-iotests/222
+++ b/tests/qemu-iotests/222
@@ -30,23 +30,23 @@  iotests.script_initialize(
     supported_platforms=['linux'],
 )
 
-patterns = [("0x5d", "0",         "64k"),
-            ("0xd5", "1M",        "64k"),
-            ("0xdc", "32M",       "64k"),
-            ("0xcd", "0x3ff0000", "64k")]  # 64M - 64K
+patterns = [('0x5d', '0',         '64k'),
+            ('0xd5', '1M',        '64k'),
+            ('0xdc', '32M',       '64k'),
+            ('0xcd', '0x3ff0000', '64k')]  # 64M - 64K
 
-overwrite = [("0xab", "0",         "64k"), # Full overwrite
-             ("0xad", "0x00f8000", "64k"), # Partial-left (1M-32K)
-             ("0x1d", "0x2008000", "64k"), # Partial-right (32M+32K)
-             ("0xea", "0x3fe0000", "64k")] # Adjacent-left (64M - 128K)
+overwrite = [('0xab', '0',         '64k'), # Full overwrite
+             ('0xad', '0x00f8000', '64k'), # Partial-left (1M-32K)
+             ('0x1d', '0x2008000', '64k'), # Partial-right (32M+32K)
+             ('0xea', '0x3fe0000', '64k')] # Adjacent-left (64M - 128K)
 
-zeroes = [("0", "0x00f8000", "32k"), # Left-end of partial-left (1M-32K)
-          ("0", "0x2010000", "32k"), # Right-end of partial-right (32M+64K)
-          ("0", "0x3fe0000", "64k")] # overwrite[3]
+zeroes = [('0', '0x00f8000', '32k'), # Left-end of partial-left (1M-32K)
+          ('0', '0x2010000', '32k'), # Right-end of partial-right (32M+64K)
+          ('0', '0x3fe0000', '64k')] # overwrite[3]
 
-remainder = [("0xd5", "0x108000",  "32k"), # Right-end of partial-left [1]
-             ("0xdc", "32M",       "32k"), # Left-end of partial-right [2]
-             ("0xcd", "0x3ff0000", "64k")] # patterns[3]
+remainder = [('0xd5', '0x108000',  '32k'), # Right-end of partial-left [1]
+             ('0xdc', '32M',       '32k'), # Left-end of partial-right [2]
+             ('0xcd', '0x3ff0000', '64k')] # patterns[3]
 
 with iotests.FilePath('base.img') as base_img_path, \
      iotests.FilePath('fleece.img') as fleece_img_path, \
@@ -58,7 +58,7 @@  with iotests.FilePath('base.img') as base_img_path, \
     log('')
 
     assert qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M') == 0
-    assert qemu_img('create', '-f', "qcow2", fleece_img_path, '64M') == 0
+    assert qemu_img('create', '-f', 'qcow2', fleece_img_path, '64M') == 0
 
     for p in patterns:
         qemu_io('-f', iotests.imgfmt,
@@ -78,43 +78,43 @@  with iotests.FilePath('base.img') as base_img_path, \
     log('--- Setting up Fleecing Graph ---')
     log('')
 
-    src_node = "drive0"
-    tgt_node = "fleeceNode"
+    src_node = 'drive0'
+    tgt_node = 'fleeceNode'
 
     # create tgt_node backed by src_node
-    log(vm.qmp("blockdev-add", {
-        "driver": "qcow2",
-        "node-name": tgt_node,
-        "file": {
-            "driver": "file",
-            "filename": fleece_img_path,
+    log(vm.qmp('blockdev-add', {
+        'driver': 'qcow2',
+        'node-name': tgt_node,
+        'file': {
+            'driver': 'file',
+            'filename': fleece_img_path,
         },
-        "backing": src_node,
+        'backing': src_node,
     }))
 
     # Establish COW from source to fleecing node
-    log(vm.qmp("blockdev-backup",
+    log(vm.qmp('blockdev-backup',
                device=src_node,
                target=tgt_node,
-               sync="none"))
+               sync='none'))
 
     log('')
     log('--- Setting up NBD Export ---')
     log('')
 
     nbd_uri = 'nbd+unix:///%s?socket=%s' % (tgt_node, nbd_sock_path)
-    log(vm.qmp("nbd-server-start",
-               {"addr": { "type": "unix",
-                          "data": { "path": nbd_sock_path } } }))
+    log(vm.qmp('nbd-server-start',
+               {'addr': { 'type': 'unix',
+                          'data': { 'path': nbd_sock_path } } }))
 
-    log(vm.qmp("nbd-server-add", device=tgt_node))
+    log(vm.qmp('nbd-server-add', device=tgt_node))
 
     log('')
     log('--- Sanity Check ---')
     log('')
 
     for p in patterns + zeroes:
-        cmd = "read -P%s %s %s" % p
+        cmd = 'read -P%s %s %s' % p
         log(cmd)
         assert qemu_io_silent('-r', '-f', 'raw', '-c', cmd, nbd_uri) == 0
 
@@ -123,7 +123,7 @@  with iotests.FilePath('base.img') as base_img_path, \
     log('')
 
     for p in overwrite:
-        cmd = "write -P%s %s %s" % p
+        cmd = 'write -P%s %s %s' % p
         log(cmd)
         log(vm.hmp_qemu_io(src_node, cmd))
 
@@ -132,7 +132,7 @@  with iotests.FilePath('base.img') as base_img_path, \
     log('')
 
     for p in patterns + zeroes:
-        cmd = "read -P%s %s %s" % p
+        cmd = 'read -P%s %s %s' % p
         log(cmd)
         assert qemu_io_silent('-r', '-f', 'raw', '-c', cmd, nbd_uri) == 0
 
@@ -153,7 +153,7 @@  with iotests.FilePath('base.img') as base_img_path, \
     log('')
 
     for p in overwrite + remainder:
-        cmd = "read -P%s %s %s" % p
+        cmd = 'read -P%s %s %s' % p
         log(cmd)
         assert qemu_io_silent(base_img_path, '-c', cmd) == 0