Investigate the parsing logic for passive tree mods in the Path of Building Lua codebase. The issue mentions that the last mod of 'Seeker Runes' is not parsed. Look for the parser function that handles notable passives, likely in files such as 'passive skills.lua' or 'mod parser.lua'. Compare how similar mods are parsed and modify the parser to handle the 'Unattached Brands gain 20% increased Brand Attachment Range per second' string. Check the issue comments for any prior discussion or attempts. Ensure the fix handles the case where the mod is the last one in a series.
