Include relative path to test in output log, use textwrap for args

With the new free-form 'name:' it can be difficult for a test developer
reading the log output to immediately make out which test (file) they
are looking at.  This commit adds the relative path to the test to the
log and formats any arguments using the textwrap package.

Example:

    Starting: path/to/test suite-supplied mode:long scratch:/tmp/9pm_i78hxc2f
                           base:/home/jocke/src/infix/test/9pm/unit_tests/harness
                           optional-positive:yes skip-positive:yes cmdl-supplied
    2025-09-14 07:03:39 1..6
    ...

Signed-off-by: Joachim Wiberg <[email protected]>

Author: troglobit

9pm.py

@@ -11,6 +11,7 @@
 import re
 import atexit
 import hashlib
+import textwrap
 from datetime import datetime
 
 TEST_CNT=0
@@ -65,8 +66,17 @@ def execute(args, test, output_log):
     test_skip = False
     err = False
 
+    cmd = path = os.path.relpath(test['case'], ROOT_PATH)
     if args:
-        output_log.write(f"Starting with arguments: {args}\n\n")
+        cmd = f"{path} {' '.join(args)}"
+
+    prefix = "Starting: "
+    wrapped = textwrap.fill(f"{prefix}{cmd}", width=100,
+                            subsequent_indent=" " * (len(prefix) +
+                                                     len(path) + 1),
+                            break_long_words=False,
+                            break_on_hyphens=False)
+    output_log.write(f"{wrapped}\n\n")
 
     while True:
         line = proc.stdout.readline().decode('utf-8')