library/rtti_implementation.m:
Return zero arity for null TypeInfo.args arrays. This fixes the
failure of the hard_coded/pretty_printing test case in the Java grade,
and probably in the C# grade as well.
tests/general/read_dir_regression.m:
Fix the failure of the failure of this test case in the Java grade,
by massaging the error message returned for an intentionally-failed
open of a directory as a plain file. When opening ".", the error message
(on my laptop, at least) returns the full absolute path name of the
current directory. Since this will be different in different workspaces,
we can't update the expected output file, but we can replace this
changeable part of the error message with a fixed string. This diff
does this.
tests/hard_coded/ho_solns.m:
Add a note about the cause of the failure of this test case.
tests/hard_coded/string_code_point.exp2:
Conform to the old switchover from the "codepoint" spelling
to "code_point".
