distance_of_time_in_words should correct process time periods longer than 1 year defined in seconds

[avakhov]

It differs from #3530 :)

Here I fix side an effect after ae7d0d8 also.

distance_of_time_in_words accepts args as integer (seconds), Date, Time, DateTime or something that responds to :to_time method. If from_time and to_time are seconds for periods more than 1 year date_helper.rb#L97 is interpreted as ActiveSupport year method. In this case creating Range object (fyear..tyear) failes.

I did change nothing in date_helper.rb#L97-110 except indent.

[avakhov]

I updated commit (fixed typo, thanks to Henrik - @dvyjones)

A couple of words about 365.25 days. In that point we need estimate amount of years between two values in seconds. Every 4th year is leap, the real life is more complicated but for this very rare case it's reasonable. The final point why I propose to use 365.25, rails has already this magic constant in Active Support active_support/core_ext/integer/time.rb#L36