treewide: split commandline into command line

src/basic/log.c

@@ -1276,7 +1276,7 @@ static bool should_parse_proc_cmdline(void) {
         if (getpid_cached() == 1)
                 return true;
 
-        /* Otherwise, parse the commandline if invoked directly by systemd. */
+        /* Otherwise, parse the command line if invoked directly by systemd. */
         return invoked_by_systemd();
 }
 

src/basic/process-util.c

@@ -198,7 +198,7 @@ int get_process_cmdline(pid_t pid, size_t max_columns, ProcessCmdlineFlags flags
         assert(pid >= 0);
         assert(ret);
 
-        /* Retrieve and format a commandline. See above for discussion of retrieval options.
+        /* Retrieve and format a command line. See above for discussion of retrieval options.
          *
          * There are two main formatting modes:
          *