https://github.com/espeak-ng/espeak-ng/issues/407

If the list file contains a text replacement to another
entry in the list file, e.g.:

	ripost     riposte $text
	riposte    rI#p0st

calling it from a prefix or suffix rule such as 'riposted'
causes word_out[0] to be NULL, as TranslateWord3 has the
information needed to perform the mapping. In this case,
no phonemes have been written in this loop and the phonemes
have been calculated, so don't override them.

The phoneme to audio tests are covered in the phoneme-audio tests.
Therefore, the language tests just need to test the text to
phoneme logic.

There is no fr-CA language dialect dialect file, nor has there
been in the espeak/espeak-ng history.

The fr-CA phoneme table defined the additional phonemes [U], [y"],
[E:], and [A]. The fr-FR phoneme table mapped these to [u], [y],
[E], and [a] respectively. This meant to describe the phonemes that
have not been merged in fr-CA, but have merged in fr-FR, as described
in https://en.wikipedia.org/wiki/Quebec_French_phonology.

The only use of these phonemes in the French dictionary was with
the word "tramway" using [E:]. This has been replaced with [E] to
match the rest of the dictionary file transcriptions, and those
phonemes for fr-CA have been removed.

If fr-CA is supported in the future, the French dictionary would
need to be modified to reverse the merger of the phonemes that are
not merged in fr-CA, with the merge logic being performed in the
fr-FR phoneme table like in the code being removed in this commit.

A corpus of SSML input files will also be needed for fuzzing.
https://github.com/espeak-ng/espeak-ng/issues/407