Add line-feed to last line (not strictly required)

ctrl/attr.ini

@@ -20,4 +20,4 @@ votes_empty       = WH					; Votes Empty
 progress_complete = WH5					; Progress Complete
 progress_empty    = WH					; Progress Incomplete
 ; Rainbow attribute configuration, up to 40 attributes, comma-separated:
-rainbow = WH,W,CH,C,MH,M,BH,B,YH,Y,GH,G,RH,R,KH
\ No newline at end of file
+rainbow = WH,W,CH,C,MH,M,BH,B,YH,Y,GH,G,RH,R,KH