diff shows unchanged files as "changed"

[tstromberg]

cd malcontent-samples/python/2024.ultralytics
mal diff v8.3.40 v8.3.41

results in many Changed file entries with no changes noted in the UI:

├─ 🟡 Changed: v8.3.41/engine/predictor.py
│     ≡ command & control [MEDIUM]
│       🟡 tool_transfer/os — references multiple operating systems: Linux, https://, macOS
│     ≡ discovery [MEDIUM]
│       🟡 system/platform — system platform identification: platform.system()
│     ≡ execution [LOW]
│       🔵 imports/python — imports python modules:
│          from pathlib import Path, from ultralytics.cfg import get, from ultralytics.data import load, from ultralytics.data.augment import LetterBox, from ultraly…
│     ≡ filesystem [LOW]
│       🔵 directory/create — creates directories: mkdir
│     ≡ networking [LOW]
│       🔵 url/embedded — contains embedded HTTPS URLs: https://docs.ultralytics.com/modes/predict/, https://youtu.be/LNwODJXcvt4
│     ≡ operating-system [LOW]
│       🔵 fd/multiplex — monitor multiple file descriptors: select
│

[egibs]

This is just a generic catch-all:

malcontent/pkg/render/terminal.go

Lines 119 to 121 in f18fb0e

	} else {
	title = fmt.Sprintf("Changed: %s", modified.Value.Path)
	}

I think we can move that into renderFileSummary and set it based on specific conditions.