Problem: comments before ifdefs are wrongly formatted

Solution: now that clang-format 6+ is used in the CI, fix it

src/options.cpp

@@ -761,10 +761,10 @@ int zmq::options_t::setsockopt (int option_,
             break;
     }
 
-            // TODO mechanism should either be set explicitly, or determined when
-            // connecting. currently, it depends on the order of setsockopt calls
-            // if there is some inconsistency, which is confusing. in addition,
-            // the assumed or set mechanism should be queryable (as a socket option)
+        // TODO mechanism should either be set explicitly, or determined when
+        // connecting. currently, it depends on the order of setsockopt calls
+        // if there is some inconsistency, which is confusing. in addition,
+        // the assumed or set mechanism should be queryable (as a socket option)
 
 #if defined(ZMQ_ACT_MILITANT)
     //  There is no valid use case for passing an error back to the application

src/socket_base.cpp

@@ -353,9 +353,9 @@ int zmq::socket_base_t::check_protocol (const std::string &protocol_) const
         return -1;
     }
 
-        //  Check whether socket type and transport protocol match.
-        //  Specifically, multicast protocols can't be combined with
-        //  bi-directional messaging patterns (socket types).
+    //  Check whether socket type and transport protocol match.
+    //  Specifically, multicast protocols can't be combined with
+    //  bi-directional messaging patterns (socket types).
 #if defined ZMQ_HAVE_OPENPGM || defined ZMQ_HAVE_NORM
     if ((protocol_ == "pgm" || protocol_ == "epgm" || protocol_ == "norm")
         && options.type != ZMQ_PUB && options.type != ZMQ_SUB
@@ -896,7 +896,7 @@ int zmq::socket_base_t::connect (const char *endpoint_uri_)
         }
     }
 
-        // TBD - Should we check address for ZMQ_HAVE_NORM???
+    // TBD - Should we check address for ZMQ_HAVE_NORM???
 
 #ifdef ZMQ_HAVE_OPENPGM
     if (protocol == "pgm" || protocol == "epgm") {

src/socks_connecter.cpp

@@ -255,7 +255,7 @@ int zmq::socks_connecter_t::connect_to_proxy ()
         }
     }
 
-        //  Connect to the remote peer.
+    //  Connect to the remote peer.
 #if defined ZMQ_HAVE_VXWORKS
     rc = ::connect (_s, (sockaddr *) tcp_addr->addr (), tcp_addr->addrlen ());
 #else

src/tcp_connecter.cpp

@@ -219,7 +219,7 @@ int zmq::tcp_connecter_t::open ()
             return -1;
     }
 
-        //  Connect to the remote peer.
+    //  Connect to the remote peer.
 #if defined ZMQ_HAVE_VXWORKS
     rc = ::connect (_s, (sockaddr *) tcp_addr->addr (), tcp_addr->addrlen ());
 #else
@@ -230,8 +230,8 @@ int zmq::tcp_connecter_t::open ()
         return 0;
     }
 
-        //  Translate error codes indicating asynchronous connect has been
-        //  launched to a uniform EINPROGRESS.
+    //  Translate error codes indicating asynchronous connect has been
+    //  launched to a uniform EINPROGRESS.
 #ifdef ZMQ_HAVE_WINDOWS
     const int last_error = WSAGetLastError ();
     if (last_error == WSAEINPROGRESS || last_error == WSAEWOULDBLOCK)

src/udp_engine.cpp

@@ -222,8 +222,8 @@ void zmq::udp_engine_t::plug (io_thread_t *io_thread_, session_base_t *session_)
         bool multicast = udp_addr->is_mcast ();
 
         if (multicast) {
-        //  Multicast addresses should be allowed to bind to more than
-        //  one port as all ports should receive the message
+            //  Multicast addresses should be allowed to bind to more than
+            //  one port as all ports should receive the message
 #ifdef SO_REUSEPORT
             rc = setsockopt (_fd, SOL_SOCKET, SO_REUSEPORT,
                              reinterpret_cast<char *> (&on), sizeof (on));

src/ypipe.hpp

@@ -62,9 +62,9 @@ template <typename T, int N> class ypipe_t : public ypipe_base_t<T>
     //  just to keep ICC and code checking tools from complaining.
     inline virtual ~ypipe_t () {}
 
-        //  Following function (write) deliberately copies uninitialised data
-        //  when used with zmq_msg. Initialising the VSM body for
-        //  non-VSM messages won't be good for performance.
+    //  Following function (write) deliberately copies uninitialised data
+    //  when used with zmq_msg. Initialising the VSM body for
+    //  non-VSM messages won't be good for performance.
 
 #ifdef ZMQ_HAVE_OPENVMS
 #pragma message save

src/ypipe_conflate.hpp

@@ -53,9 +53,9 @@ template <typename T> class ypipe_conflate_t : public ypipe_base_t<T>
     //  just to keep ICC and code checking tools from complaining.
     inline virtual ~ypipe_conflate_t () {}
 
-        //  Following function (write) deliberately copies uninitialised data
-        //  when used with zmq_msg. Initialising the VSM body for
-        //  non-VSM messages won't be good for performance.
+    //  Following function (write) deliberately copies uninitialised data
+    //  when used with zmq_msg. Initialising the VSM body for
+    //  non-VSM messages won't be good for performance.
 
 #ifdef ZMQ_HAVE_OPENVMS
 #pragma message save

src/zmq.cpp

@@ -712,7 +712,7 @@ const char *zmq_msg_gets (const zmq_msg_t *msg_, const char *property_)
     return NULL;
 }
 
-    // Polling.
+// Polling.
 
 #if defined ZMQ_HAVE_POLLER
 inline int zmq_poller_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)