Missing possessive apostrophe grammar

**The Error**
Missed a possessive apostrophe.

Text: I tweak my neural, allowing me to smile, to feel the thrill of our banter before grabbing my phone, standing, then heading upstairs. After opening my balcony door, I don’t see the outside but instead a cars interior spreads out, like its door has merged with mine. Curious at this advanced technology, I step inside.

The word cars should be car's, possessive to interior. Edge browser grammar picks this up.

**Potential Edge Cases**
When might this not apply?

The possessive use of its, because it's means it is. For example, its interior spreads out, its would not have an apostrophe.

No file or test is named in the issue. Start by locating the grammar rule or entry point that handles possessives, then inspect existing coverage for apostrophes and the its/it's distinction. Done means the reported “a cars interior” text is flagged or corrected as “a car's interior” without treating possessive “its” as an error.

Written by the indexing model from the issue text.