Fix precisedelta to handle negative timedelta

[agbesiprincekwabena-cmd]

Fixes #

Changes proposed in this pull request:

Fixes #379

Problem

precisedelta() returned empty string or incorrect values for negative timedelta (e.g. -1 day showed as "1 day" or "" instead of "1 day ago").

The abs() logic in time.py was incorrectly converting negative deltas.

Solution

• Handle negative timedelta by tracking sign separately
• Convert to positive for calculation, then append " ago" suffix if original was negative
• Preserves existing behavior for positive deltas

Tested with:

• timedelta(days=-1) -> "1 day ago"
• timedelta(days=-1, hours=-2) -> "1 day, 2 hours ago"
• Positive deltas still work as before

[hugovk]

Closing as a duplicate of #380 which you would see from looking at #379.

Please check next time.