sanitycheck: fix --jobs help message + other cosmetic fixes

The --jobs default was recently changed in commit 9f4f57eed3a3, update
its help message.

Add the hopefully last missing verbose("Spawning...") statement.

Fix comment updated in commit 095b82a301f9.

Replace two tags with whitespace.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>
diff --git a/scripts/sanitycheck b/scripts/sanitycheck
index ad359cf..9b0b8dc 100755
--- a/scripts/sanitycheck
+++ b/scripts/sanitycheck
@@ -816,8 +816,8 @@
                     out_state = harness.state
 
                 # if we get some state, that means test is doing well, we reset
-                # the timeout and wait for 2 more seconds just in case we have
-                # crashed after test has completed. We wait longer if code
+                # the timeout and wait for 2 more seconds to catch anything
+                # printed late. We wait much longer if code
                 # coverage is enabled since dumping this information can
                 # take some time.
                 if not timeout_extended or harness.capture_coverage:
@@ -1275,6 +1275,7 @@
             handler = QEMUHandler(instance, "qemu")
         elif type == "native":
             handler = BinaryHandler(instance, "native")
+            # defined by __build_dir in cmake/boilerplate.cmake
             handler.binary = os.path.join(outdir, "zephyr", "zephyr.exe")
             if options.enable_coverage:
                 args += ["EXTRA_LDFLAGS=--coverage"]
@@ -1395,6 +1396,8 @@
             # assure language neutral environment
             make_env = os.environ.copy()
             make_env['LC_MESSAGES'] = 'C.UTF-8'
+            verbose("In %s, spawning: " % os.getcwd()
+                    + " ".join(shlex.quote(word)for word in cmd))
             p = subprocess.Popen(cmd, stderr=subprocess.PIPE,
                                  stdout=devnull, env=make_env)
 
@@ -2908,8 +2911,8 @@
 
     parser.add_argument(
         "-j", "--jobs", type=int,
-        help="Number of jobs for building, defaults to number of CPU threads "
-        "overcommited by factor 2")
+        help="Number of jobs for building, defaults to number of CPU threads, "
+        "overcommited by factor 2 when --build-only")
 
     parser.add_argument(
         "--device-testing", action="store_true",
@@ -2921,7 +2924,7 @@
         help="Specify a fixture that a board might support")
     parser.add_argument(
         "--device-serial",
-		help="Serial device for accessing the board (e.g., /dev/ttyACM0)")
+        help="Serial device for accessing the board (e.g., /dev/ttyACM0)")
     parser.add_argument(
             "--show-footprint", action="store_true",
             help="Show footprint statistics and deltas since last release."