On or around line 439, improper pluralization.
The asterisk following ipv6 indicates that ipv6 support was disabled the last time this packages was installed.
Should be 'package'.
Steps to Reproduce:
1. man emerge
Confirmed in 2.2_rc67.
This is fixed in 2.2_rc73, but I'll leave this bug open until it's fixed in an unmasked version.
This is fixed in 2.1.9.