improve: suffix selection clarity on post-fs-data.sh

Now the exclusions are explicitly shown in the if statement instead of relying on it being false
covers an edge-case where a file is added manually with suffix higher than 3 making it add new logs forever instead of overwriting the first one and starting again

Signed-off-by: TheSillyOk <priv.ld@proton.me>

Author: TheSillyOk

post-fs-data.sh

@@ -40,10 +40,10 @@ watch_dmesg() {
 }
 
 LATEST_SUFFIX=$(basename $(ls -t "$SAVE_FOLDER"/DebugAssistant*.log | grep -v "Redacted" | head -n 1) | grep -oE "([0-9]+)?")
-if [[ -f "$SAVE_FOLDER/DebugAssistant.log" && "$LATEST_SUFFIX" != "3" ]]; then
-  SUFFIX="-$(( ${LATEST_SUFFIX:-1} + 1 ))"
-else
+if [[ -z "$(ls $SAVE_FOLDER/DebugAssistant*.log)" || "${LATEST_SUFFIX:-1}" -ge 3 ]]; then
   SUFFIX=""
+else
+  SUFFIX="-$(( ${LATEST_SUFFIX:-1} + 1 ))"
 fi
 
 start_log "$SUFFIX"