streams: use ~s and ~a properly in errors.

Objects should almost always be printed as ~s.
If a bad object is printed as ~a, junk could result
on the terminal if it's a buffer, for instance.

* stream.c (stdio_maybe_read_error, stdio_maybe_error,
stdio_close, pipe_close, parse_mode, normalize_mode,
normalize_mode_no_bin, cat_unget_byte, cat_unget_char,
unget_byte, open_directory, open_file, open_tail,
open_command, open_process, run, remove_path, rename_path):
Revise conversion specifiers in error message formatting.

0 files changed, 0 insertions, 0 deletions