Removing trailing slash and extra endif

modules/libpref/src/Makefile.in

@@ -52,7 +52,7 @@ PREF_JS_EXPORTS	= \
 		$(NULL)
 
 ifdef MOZ_DEBUG
-PREF_JS_EXPORTS	+= $(srcdir)/debug-developer.js \
+PREF_JS_EXPORTS	+= $(srcdir)/debug-developer.js
 endif
 ifeq ($(MOZ_WIDGET_TOOLKIT),os2)
 PREF_JS_EXPORTS	+= $(srcdir)/os2/os2pref.js
@@ -63,7 +63,6 @@ else
 PREF_JS_EXPORTS	+= $(srcdir)/unix/unix.js
 endif
 endif
-endif
 
 ifeq ($(OS_ARCH),OpenVMS)
 PREF_JS_EXPORTS	+= $(srcdir)/unix/openvms.js