Consistent spacing for lengthy error messages

Also, we removed the display of the current value of
max_connections/MaxBackends from some messages earlier, because it was
confusing, so do that in the remaining one as well.

src/backend/port/sysv_sema.c

@@ -116,16 +116,14 @@ InternalIpcSemaphoreCreate(IpcSemaphoreKey semKey, int numSems)
 						   (unsigned long) semKey, numSems,
 						   IPC_CREAT | IPC_EXCL | IPCProtection),
 				 (errno == ENOSPC) ?
-				 errhint("This error does *not* mean that you have run out of disk space.\n"
+				 errhint("This error does *not* mean that you have run out of disk space.  "
 		  "It occurs when either the system limit for the maximum number of "
 			 "semaphore sets (SEMMNI), or the system wide maximum number of "
 			"semaphores (SEMMNS), would be exceeded.  You need to raise the "
 		  "respective kernel parameter.  Alternatively, reduce PostgreSQL's "
-		"consumption of semaphores by reducing its max_connections parameter "
-						 "(currently %d).\n"
+		"consumption of semaphores by reducing its max_connections parameter.\n"
 			  "The PostgreSQL documentation contains more information about "
-						 "configuring your system for PostgreSQL.",
-						 MaxBackends) : 0));
+						 "configuring your system for PostgreSQL.") : 0));
 	}
 
 	return semId;

src/backend/port/sysv_shmem.c

@@ -173,7 +173,7 @@ InternalIpcMemoryCreate(IpcMemoryKey memKey, Size size)
 						 "memory configuration.",
 						 (unsigned long) size) : 0,
 				 (errno == ENOSPC) ?
-				 errhint("This error does *not* mean that you have run out of disk space. "
+				 errhint("This error does *not* mean that you have run out of disk space.  "
 						 "It occurs either if all available shared memory IDs have been taken, "
 						 "in which case you need to raise the SHMMNI parameter in your kernel, "
 		  "or because the system's overall limit for shared memory has been "