Data update

Task/Longest-common-substring/Yabasic/longest-common-substring.basic

@@ -1,8 +1,8 @@
 sub LCS$(a$, b$)
-    if len(a$) = 0 or len(b$) = 0 then return "" : endif
+    if len(a$) = 0 or len(b$) = 0  return
 	while len(b$)
 		for j = len(b$) to 1 step -1
-			if instr(a$, left$(b$, j)) then return left$(b$, j) : endif
+			if instr(a$, left$(b$, j))  return left$(b$, j)
 		next j
 		b$ = mid$(b$, 2)
 	wend