Changes in version 0.29:

Recognition of 'L' with right uptick has been improved.

File diagnostics have been reformatted as 'PROGRAM: FILE: MESSAGE'.

Diagnostics caused by invalid arguments to command-line options now show the
argument and the name of the option.

The option '-o, --output' now creates missing intermediate directories when
writing to a file.

The variable MAKEINFO has been added to configure and Makefile.in.
