Ensure debug output ends in newline

* src/load.c (load_object): Debug output strings must include \n.
* src/variable.c (target_environment): Ditto.
* src/posixos.c: Remove extra newlines.
diff --git a/src/load.c b/src/load.c
index f86027d..263eb35 100644
--- a/src/load.c
+++ b/src/load.c
@@ -84,7 +84,7 @@
         {
           const char *err = dlerror ();
           if (noerror)
-            DB (DB_BASIC, ("%s", err));
+            DB (DB_BASIC, ("%s\n", err));
           else
             OS (error, flocp, "%s", err);
           return NULL;
diff --git a/src/posixos.c b/src/posixos.c
index 3538a6b..8693b74 100644
--- a/src/posixos.c
+++ b/src/posixos.c
@@ -163,8 +163,7 @@
             OSS (fatal, NILF, _("Cannot open jobserver %s: %s"),
                  fifo_name, strerror (errno));
 
-          DB (DB_JOBS,
-              (_("Jobserver setup (fifo %s)\n"), fifo_name));
+          DB (DB_JOBS, (_("Jobserver setup (fifo %s)\n"), fifo_name));
 
           js_type = js_fifo;
         }
@@ -180,8 +179,8 @@
       if (r < 0)
         pfatal_with_name (_("creating jobs pipe"));
 
-      DB (DB_JOBS,
-          (_("Jobserver setup (fds %d,%d)\n"), job_fds[0], job_fds[1]));
+      DB (DB_JOBS, (_("Jobserver setup (fds %d,%d)\n"),
+                    job_fds[0], job_fds[1]));
 
       js_type = js_pipe;
     }
@@ -234,8 +233,7 @@
   /* If not, it must be a simple pipe.  */
   else if (sscanf (auth, "%d,%d", &rfd, &wfd) == 2)
     {
-      DB (DB_JOBS,
-          (_("Jobserver client (fds %d,%d)\n"), rfd, wfd));
+      DB (DB_JOBS, (_("Jobserver client (fds %d,%d)\n"), rfd, wfd));
 
       /* The parent overrode our FDs because we aren't a recursive make.  */
       if (rfd == -2 || wfd == -2)
diff --git a/src/variable.c b/src/variable.c
index 30f4424..6c3d212 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -1106,8 +1106,9 @@
                function, just skip it.  */
             if (v->expanding && file == NULL)
               {
-                DB (DB_VERBOSE, (_("%s:%lu: Skipping export of %s to shell function due to recursive expansion"),
-                                 v->fileinfo.filenm, v->fileinfo.lineno, v->name));
+                DB (DB_VERBOSE,
+                    (_("%s:%lu: Skipping export of %s to shell function due to recursive expansion\n"),
+                     v->fileinfo.filenm, v->fileinfo.lineno, v->name));
                 continue;
               }