A single percent sign might be interpreted as a string format directive
and shall thus be escaped - doubling it - to actually indicate a
percentage.
Without the escape, pytest fails to run test_fdt.py with the following
error:
ValueError: Test coverage failure
fdt code coverage: Traceback (most recent call last):
File "/usr/lib64/python3.14/argparse.py", line 1748, in _check_help
formatter._expand_help(action)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
File "/usr/lib64/python3.14/argparse.py", line 676, in _expand_help
return help_string % params
~~~~~~~~~~~~^~~~~~~~
TypeError: %c requires an int or a unicode character, not dict
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/home/user/u-boot/./tools/dtoc/test_fdt", line 1002, in <module>
sys.exit(main())
~~~~^^
File "/home/user/u-boot/./tools/dtoc/test_fdt", line 987, in main
parser.add_argument('-T', '--test-coverage', action='store_true',
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
default=False,
^^^^^^^^^^^^^^
help='run tests and check for 100% coverage')
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.14/argparse.py", line 1562, in add_argument
self._check_help(action)
~~~~~~~~~~~~~~~~^^^^^^^^
File "/usr/lib64/python3.14/argparse.py", line 1750, in _check_help
raise ValueError('badly formed help string') from exc
ValueError: badly formed help string
Fixes: 7640b16660 ("test_fdt: Convert to use argparse")
Signed-off-by: Francesco Valla <francesco@valla.it>
badf750282