You can not select more than 25 topicsTopics must start with a chinese character,a letter or number, can include dashes ('-') and can be up to 35 characters long.
Tests indicate that line length alone does not make browsers slow, so
increase the default threshold after which diffs get surpressed for line
length from 500 to a more reasonable 5000 characters.
Fixes: https://github.com/go-gitea/gitea/issues/1826