conf: simplify Buffer Indentation in virDomainNetDefFormat

This function has several calls to increase the buffer indent by 6,
then decrease it again, then increase, then decrease. Additionally,
there were several printfs that had 6 spaces at the beginning of the
line.

virDomainActualNetDefFormat, which is called by virDomainNetDefFormat,
had similar ugliness.

This patch changes both functions to just increase the indent at the
beginning, decrease it at (well, just before*) the end, and remove all
of the occurences of 6/8 spaces at the beginning of lines.

*The indent had to be reset before the end of the function because
virDomainDeviceInfoFormat assumes a 0 indent and is called from many
other places, and I didn't want to do an overhaul of every caller of
that function. A separate patch to switch all of domain_conf.c would
be a useful exercise, but my current goal is unrelated to that, so
I'll leave it for another day.

src/conf/domain_conf.c

@@ -11559,21 +11559,22 @@ virDomainActualNetDefFormat(virBufferPtr buf,
         return -1;
     }
 
-    virBufferAsprintf(buf, "      <actual type='%s'", type);
+    virBufferAsprintf(buf, "<actual type='%s'", type);
     if (def->type == VIR_DOMAIN_NET_TYPE_HOSTDEV &&
         def->data.hostdev.def.managed) {
         virBufferAddLit(buf, " managed='yes'");
     }
     virBufferAddLit(buf, ">\n");
 
+    virBufferAdjustIndent(buf, 2);
     switch (def->type) {
     case VIR_DOMAIN_NET_TYPE_BRIDGE:
-        virBufferEscapeString(buf, "        <source bridge='%s'/>\n",
+        virBufferEscapeString(buf, "<source bridge='%s'/>\n",
                               def->data.bridge.brname);
         break;
 
     case VIR_DOMAIN_NET_TYPE_DIRECT:
-        virBufferAddLit(buf, "        <source");
+        virBufferAddLit(buf, "<source");
         if (def->data.direct.linkdev)
             virBufferEscapeString(buf, " dev='%s'",
                                   def->data.direct.linkdev);
@@ -11589,12 +11590,10 @@ virDomainActualNetDefFormat(virBufferPtr buf,
         break;
 
     case VIR_DOMAIN_NET_TYPE_HOSTDEV:
-        virBufferAdjustIndent(buf, 8);
         if (virDomainHostdevSourceFormat(buf, &def->data.hostdev.def,
                                          flags, true) < 0) {
             return -1;
         }
-        virBufferAdjustIndent(buf, -8);
         break;
 
     case VIR_DOMAIN_NET_TYPE_NETWORK:
@@ -11605,14 +11604,13 @@ virDomainActualNetDefFormat(virBufferPtr buf,
         return -1;
     }
 
-    virBufferAdjustIndent(buf, 8);
     if (virNetDevVPortProfileFormat(def->virtPortProfile, buf) < 0)
        return -1;
     if (virNetDevBandwidthFormat(def->bandwidth, buf) < 0)
         return -1;
-    virBufferAdjustIndent(buf, -8);
 
-    virBufferAddLit(buf, "      </actual>\n");
+    virBufferAdjustIndent(buf, -2);
+    virBufferAddLit(buf, "</actual>\n");
     return 0;
 }
 
@@ -11636,14 +11634,15 @@ virDomainNetDefFormat(virBufferPtr buf,
     }
     virBufferAddLit(buf, ">\n");
 
+    virBufferAdjustIndent(buf, 6);
     virBufferAsprintf(buf,
-                      "      <mac address='%02x:%02x:%02x:%02x:%02x:%02x'/>\n",
+                      "<mac address='%02x:%02x:%02x:%02x:%02x:%02x'/>\n",
                       def->mac.addr[0], def->mac.addr[1], def->mac.addr[2],
                       def->mac.addr[3], def->mac.addr[4], def->mac.addr[5]);
 
     switch (def->type) {
     case VIR_DOMAIN_NET_TYPE_NETWORK:
-        virBufferEscapeString(buf, "      <source network='%s'",
+        virBufferEscapeString(buf, "<source network='%s'",
                               def->data.network.name);
         virBufferEscapeString(buf, " portgroup='%s'",
                               def->data.network.portgroup);
@@ -11654,39 +11653,41 @@ virDomainNetDefFormat(virBufferPtr buf,
         break;
 
     case VIR_DOMAIN_NET_TYPE_ETHERNET:
-        virBufferEscapeString(buf, "      <source dev='%s'/>\n",
+        virBufferEscapeString(buf, "<source dev='%s'/>\n",
                               def->data.ethernet.dev);
         if (def->data.ethernet.ipaddr)
-            virBufferAsprintf(buf, "      <ip address='%s'/>\n",
+            virBufferAsprintf(buf, "<ip address='%s'/>\n",
                               def->data.ethernet.ipaddr);
         break;
 
     case VIR_DOMAIN_NET_TYPE_BRIDGE:
-        virBufferEscapeString(buf, "      <source bridge='%s'/>\n",
+        virBufferEscapeString(buf, "<source bridge='%s'/>\n",
                               def->data.bridge.brname);
-        if (def->data.bridge.ipaddr)
-            virBufferAsprintf(buf, "      <ip address='%s'/>\n",
+        if (def->data.bridge.ipaddr) {
+            virBufferAsprintf(buf, "<ip address='%s'/>\n",
                               def->data.bridge.ipaddr);
+        }
         break;
 
     case VIR_DOMAIN_NET_TYPE_SERVER:
     case VIR_DOMAIN_NET_TYPE_CLIENT:
     case VIR_DOMAIN_NET_TYPE_MCAST:
-        if (def->data.socket.address)
-            virBufferAsprintf(buf, "      <source address='%s' port='%d'/>\n",
+        if (def->data.socket.address) {
+            virBufferAsprintf(buf, "<source address='%s' port='%d'/>\n",
                               def->data.socket.address, def->data.socket.port);
-        else
-            virBufferAsprintf(buf, "      <source port='%d'/>\n",
+        } else {
+            virBufferAsprintf(buf, "<source port='%d'/>\n",
                               def->data.socket.port);
+        }
         break;
 
     case VIR_DOMAIN_NET_TYPE_INTERNAL:
-        virBufferEscapeString(buf, "      <source name='%s'/>\n",
+        virBufferEscapeString(buf, "<source name='%s'/>\n",
                               def->data.internal.name);
         break;
 
     case VIR_DOMAIN_NET_TYPE_DIRECT:
-        virBufferEscapeString(buf, "      <source dev='%s'",
+        virBufferEscapeString(buf, "<source dev='%s'",
                               def->data.direct.linkdev);
         virBufferAsprintf(buf, " mode='%s'",
                           virNetDevMacVLanModeTypeToString(def->data.direct.mode));
@@ -11694,12 +11695,10 @@ virDomainNetDefFormat(virBufferPtr buf,
         break;
 
     case VIR_DOMAIN_NET_TYPE_HOSTDEV:
-        virBufferAdjustIndent(buf, 6);
         if (virDomainHostdevSourceFormat(buf, &def->data.hostdev.def,
                                          flags, true) < 0) {
             return -1;
         }
-        virBufferAdjustIndent(buf, -6);
         break;
 
     case VIR_DOMAIN_NET_TYPE_USER:
@@ -11707,26 +11706,22 @@ virDomainNetDefFormat(virBufferPtr buf,
         break;
     }
 
-    virBufferAdjustIndent(buf, 6);
     if (virNetDevVPortProfileFormat(def->virtPortProfile, buf) < 0)
        return -1;
-    virBufferAdjustIndent(buf, -6);
-
-    virBufferEscapeString(buf, "      <script path='%s'/>\n",
+    virBufferEscapeString(buf, "<script path='%s'/>\n",
                           def->script);
     if (def->ifname &&
         !((flags & VIR_DOMAIN_XML_INACTIVE) &&
           (STRPREFIX(def->ifname, VIR_NET_GENERATED_PREFIX)))) {
         /* Skip auto-generated target names for inactive config. */
-        virBufferEscapeString(buf, "      <target dev='%s'/>\n",
-                              def->ifname);
+        virBufferEscapeString(buf, "<target dev='%s'/>\n", def->ifname);
     }
     if (def->model) {
-        virBufferEscapeString(buf, "      <model type='%s'/>\n",
+        virBufferEscapeString(buf, "<model type='%s'/>\n",
                               def->model);
         if (STREQ(def->model, "virtio") &&
             (def->driver.virtio.name || def->driver.virtio.txmode)) {
-            virBufferAddLit(buf, "      <driver");
+            virBufferAddLit(buf, "<driver");
             if (def->driver.virtio.name) {
                 virBufferAsprintf(buf, " name='%s'",
                                   virDomainNetBackendTypeToString(def->driver.virtio.name));
@@ -11747,27 +11742,25 @@ virDomainNetDefFormat(virBufferPtr buf,
         }
     }
     if (def->filter) {
-        virBufferAdjustIndent(buf, 6);
         if (virNWFilterFormatParamAttributes(buf, def->filterparams,
                                              def->filter) < 0)
             return -1;
-        virBufferAdjustIndent(buf, -6);
     }
 
     if (def->tune.sndbuf_specified) {
-        virBufferAddLit(buf,   "      <tune>\n");
-        virBufferAsprintf(buf, "        <sndbuf>%lu</sndbuf>\n",
-                          def->tune.sndbuf);
-        virBufferAddLit(buf,   "      </tune>\n");
+        virBufferAddLit(buf,   "<tune>\n");
+        virBufferAsprintf(buf, "  <sndbuf>%lu</sndbuf>\n", def->tune.sndbuf);
+        virBufferAddLit(buf,   "</tune>\n");
     }
 
-    if (def->linkstate)
-        virBufferAsprintf(buf, "      <link state='%s'/>\n",
+    if (def->linkstate) {
+        virBufferAsprintf(buf, "<link state='%s'/>\n",
                           virDomainNetInterfaceLinkStateTypeToString(def->linkstate));
+    }
 
-    virBufferAdjustIndent(buf, 6);
     if (virNetDevBandwidthFormat(def->bandwidth, buf) < 0)
         return -1;
+
     virBufferAdjustIndent(buf, -6);
 
     if (virDomainDeviceInfoFormat(buf, &def->info,