treewide: fix typos and indentation

src/hostname/hostnamed.c

@@ -212,7 +212,7 @@ try_dmi:
            unreliable enough, so let's not do any additional guesswork
            on top of that.
 
-           See the SMBIOS Specification 4.0 section 7.4.1 for
+           See the SMBIOS Specification 3.0 section 7.4.1 for
            details about the values listed here:
 
            https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.0.0.pdf

src/resolve/resolved-dns-packet.c

@@ -80,7 +80,7 @@ void dns_packet_set_flags(DnsPacket *p, bool dnssec_checking_disabled, bool trun
                 h->flags = htobe16(DNS_PACKET_MAKE_FLAGS(0 /* qr */,
                                                          0 /* opcode */,
                                                          0 /* c */,
-                                                         0/* tc */,
+                                                         0 /* tc */,
                                                          0 /* t */,
                                                          0 /* ra */,
                                                          0 /* ad */,
@@ -1848,7 +1848,7 @@ int dns_packet_read_rr(DnsPacket *p, DnsResourceRecord **ret, size_t *start) {
         case DNS_TYPE_NSEC: {
 
                 /*
-                 * RFC6762, section 18.14 explicly states mDNS should use name compression.
+                 * RFC6762, section 18.14 explictly states mDNS should use name compression.
                  * This contradicts RFC3845, section 2.1.1
                  */
 

src/resolve/resolved-dns-scope.c

@@ -506,7 +506,7 @@ int dns_scope_good_key(DnsScope *s, DnsResourceKey *key) {
 
         if (s->protocol == DNS_PROTOCOL_DNS) {
 
-                /* On classic DNS, lookin up non-address RRs is always
+                /* On classic DNS, looking up non-address RRs is always
                  * fine. (Specifically, we want to permit looking up
                  * DNSKEY and DS records on the root and top-level
                  * domains.) */

src/resolve/resolved-dns-transaction.c

@@ -843,7 +843,7 @@ static int dns_transaction_make_packet_mdns(DnsTransaction *t) {
         assert(t);
         assert(t->scope->protocol == DNS_PROTOCOL_MDNS);
 
-        /* Discard any previously prepared packet, so we can start over and coaleasce again */
+        /* Discard any previously prepared packet, so we can start over and coalesce again */
         t->sent = dns_packet_unref(t->sent);
 
         r = dns_packet_new_query(&p, t->scope->protocol, 0, false);