Searching `head:` doesn't count raku-initial m as a consonant

[ijo-isi]

When searching Toadua with head:, using a C doesn't match the letter m, even when the m appears at the start of a raku.

For example, searching head:Cameı doesn't yield the definition of mameı, even though head:mameı does.

[uakci]

Thanks for the report, it appears that we’ve completely missed updating the formatting/parsing routines for Delta. (A similar issue happens with tone numbers misinteracting with m-final syllables, and I think the two issues are related but I can’t be sure.)