scripts: pylib: twister: Fix --save-tests help

As saving tests writes to file, rather than appending to it,
we should indicate that in the --save-tests help.
--load-tests help changed so its grammar is the same as --save-tests's.

Signed-off-by: Lukasz Mrugala <[email protected]>

Author: LukaszMrugala

scripts/pylib/twister/twisterlib/environment.py

@@ -86,14 +86,14 @@ def add_parse_arguments(parser = None):
         "--save-tests",
         metavar="FILENAME",
         action="store",
-        help="Append list of tests and platforms to be run to file.")
+        help="Write a list of tests and platforms to be run to file.")
 
     case_select.add_argument(
         "-F",
         "--load-tests",
         metavar="FILENAME",
         action="store",
-        help="Load list of tests and platforms to be run from file.")
+        help="Load a list of tests and platforms to be run from file.")
 
     case_select.add_argument(
         "-T", "--testsuite-root", action="append", default=[],