Improve pt-br wordlist

[drebs]

Wordlist in pt-br was first introduced in 7743ed5. The differences to this one are:

• 9-characters words are introduced.
• suffixes removal is made after accounting for popularity.
• less frequent words that differ only in the last character are removed.

The current pt-br wordlist was generated as follows:

1. Download a dump of portuguese Wikipedia pages, process all pages and determine the frequency of each word.
2. Start from /usr/share/dict/brazilian and filter out:
   • words not matching /^[a-z]+$/,
   • words shorter than 4 characters, and
   • words longer than 9 characters.
3. Sort remaining words using pt Wikipedia frequencies.
4. Take the top 30K words (just because after filtering we still get roughly the amount we need).
5. Filter out:
   • all words that are a suffix of any other word in the list.
   • less frequent words that differ only by the last character.
6. Take the 7776 most frequent words.

No further curation was made.

[ulif]

Nice, thank you!