libutil/test: update formatting in stdlog tests

Problem: The stdlog unit tests predate many Flux code formatting
conventions. Many lines exceed 80 characters and/or are inconsistently
split across lines.

Update formatting of this unit test for consistency and readability.

Author: grondo

src/common/libutil/test/stdlog.c

@@ -127,28 +127,41 @@ int main(int argc, char** argv)
         "stdlog_decode decoded procid") ;
     ok (streq (hdr.msgid, cln.msgid),
         "stdlog_decode decoded msgid") ;
-    ok (sdlen == strlen (STDLOG_NILVALUE) && strncmp (sd, STDLOG_NILVALUE, sdlen) == 0,
+    ok (sdlen == strlen (STDLOG_NILVALUE)
+        && strncmp (sd, STDLOG_NILVALUE, sdlen) == 0,
         "stdlog_decode decoded structured data");
-    ok (msglen == strlen (STDLOG_NILVALUE) && strncmp (msg, STDLOG_NILVALUE, msglen) == 0,
+    ok (msglen == strlen (STDLOG_NILVALUE)
+        && strncmp (msg, STDLOG_NILVALUE, msglen) == 0,
         "stdlog_decode decoded message");
 
     /* Check that trailing \n or \r in message are dropped
      */
     stdlog_init (&hdr);
-    len = stdlog_encode (buf, sizeof (buf), &hdr,
+    len = stdlog_encode (buf,
+                         sizeof (buf),
+                         &hdr,
                          STDLOG_NILVALUE,
                          "Hello whorl\n\r\n");
     ok (len >= 0,
         "stdlog_encode worked with message");
     diag ("%.*s", len, buf);
     n = stdlog_decode (buf, len, &hdr, &sd, &sdlen, &msg, &msglen);
-    ok (n == 0 && strncmp (msg, "Hello whorl", msglen) == 0,
+    ok (n == 0
+        && strncmp (msg, "Hello whorl", msglen) == 0,
         "trailing cr/lf chars were truncated");
 
     int i = 0;
     while (valid[i] != NULL) {
-        n = stdlog_decode (valid[i], strlen (valid[i]), &hdr, &sd, &sdlen, &msg, &msglen);
-        ok (n == 0 && msglen == strlen ("message") && strncmp (msg, "message", msglen) == 0,
+        n = stdlog_decode (valid[i],
+                           strlen (valid[i]),
+                           &hdr,
+                           &sd,
+                           &sdlen,
+                           &msg,
+                           &msglen);
+        ok (n == 0
+            && msglen == strlen ("message")
+            && strncmp (msg, "message", msglen) == 0,
             "successfully decoded %s", valid[i]);
         i++;
     }