4.0b3

- Fix for empty lines.
- Went back to using FIND in the main loop for the good reasons stated by @earthing

updater.bat

@@ -3,7 +3,7 @@ TITLE ghacks user.js updater
 
 REM ### ghacks-user.js updater for Windows
 REM ## author: @claustromaniac
-REM ## version: 4.0b2
+REM ## version: 4.0b3
 
 SET _myname=%~n0
 SET _myparams=%*
@@ -200,15 +200,15 @@ REM ############ Merge function ############
 SETLOCAL DisableDelayedExpansion
 (
 	FOR /F "tokens=1,* delims=," %%G IN ('FINDSTR /B /I /C:"user_pref" "%~1"') DO (SET "%%G=%%H")
-	FOR /F "tokens=1,* delims=:" %%I IN ('FINDSTR /N "^" "%~1"') DO (
-		FOR /F "tokens=1,* delims=," %%K IN ("%%J") DO (
+	FOR /F "tokens=1,* delims=]" %%I IN ('FIND /N /V "" ^< "%~1"') DO (
+		FOR /F "delims=," %%K IN ("%%J") DO (
 			IF NOT [user_pref("_user.js.parrot"]==[%%K] (
 				IF DEFINED %%K (
 					SETLOCAL EnableDelayedExpansion
-					FOR /F "delims=" %%M IN ("!%%K!") DO (
+					FOR /F "delims=" %%L IN ("!%%K!") DO (
 						ENDLOCAL
-						IF NOT "%%M"=="ALREADY MERGED" (
-							ECHO:%%K,%%M
+						IF NOT "%%L"=="ALREADY MERGED" (
+							ECHO:%%K,%%L
 							SET "%%K=ALREADY MERGED"
 						)
 					)