diff --git a/lib.nas b/lib.nas
index 57105c7..005dca1 100644
--- a/lib.nas
+++ b/lib.nas
@@ -379,7 +379,7 @@ var math=
     pi:    3.14159265358979323846264338327950288,
     inf:   1/0,
     nan:   0/0,
-    abs:   func(x)  {return x>0?x:-x;            },
+    abs:   func(x)  {return x>0?x:-x;    },
     floor: func(x)  {return __floor(x);  },
     pow:   func(x,y){return __pow(x,y);  },
     sin:   func(x)  {return __sin(x);    },
@@ -391,8 +391,8 @@ var math=
     sqrt:  func(x)  {return __sqrt(x);   },
     atan2: func(x,y){return __atan2(x,y);},
     isnan: func(x)  {return __isnan(x);  },
-    max:   func(x,y){return x>y?x:y;             },
-    min:   func(x,y){return x<y?x:y;             }
+    max:   func(x,y){return x>y?x:y;     },
+    min:   func(x,y){return x<y?x:y;     }
 };
 
 var unix=
diff --git a/stl/lib.nas b/stl/lib.nas
index 57105c7..005dca1 100644
--- a/stl/lib.nas
+++ b/stl/lib.nas
@@ -379,7 +379,7 @@ var math=
     pi:    3.14159265358979323846264338327950288,
     inf:   1/0,
     nan:   0/0,
-    abs:   func(x)  {return x>0?x:-x;            },
+    abs:   func(x)  {return x>0?x:-x;    },
     floor: func(x)  {return __floor(x);  },
     pow:   func(x,y){return __pow(x,y);  },
     sin:   func(x)  {return __sin(x);    },
@@ -391,8 +391,8 @@ var math=
     sqrt:  func(x)  {return __sqrt(x);   },
     atan2: func(x,y){return __atan2(x,y);},
     isnan: func(x)  {return __isnan(x);  },
-    max:   func(x,y){return x>y?x:y;             },
-    min:   func(x,y){return x<y?x:y;             }
+    max:   func(x,y){return x>y?x:y;     },
+    min:   func(x,y){return x<y?x:y;     }
 };
 
 var unix=
diff --git a/test/bfs.nas b/test/bfs.nas
index cb112b6..407b33b 100644
--- a/test/bfs.nas
+++ b/test/bfs.nas
@@ -28,6 +28,8 @@ var bfs=func(begin,end){
     que.push(begin);
     map[begin[0]][begin[1]]=2;
     map[end[0]][end[1]]=0;
+    if(map[1][0]==1 and map[0][1]==1)
+        map[1][0]=0;
     while(!que.empty()){
         var vertex=que.front();
         que.pop();
diff --git a/test/diff.nas b/test/diff.nas
index 64f3c3a..b22c115 100644
--- a/test/diff.nas
+++ b/test/diff.nas
@@ -21,11 +21,8 @@ var myers=func(src,dst,show_table=0){
 
     if(show_table){
         var curve=[
-            ["+---",
-            "|   "],
-            [
-            "+---",
-            "| \\ "]
+            ["+---","|   "],
+            ["+---","| \\ "]
         ];
         var s="";
         forindex(var y;dst){
@@ -41,9 +38,7 @@ var myers=func(src,dst,show_table=0){
         print(s~"+\n");
     }
 
-    var total=[];
-    var path=[];
-    var vec=[[0,0,-1]];
+    var (total,path,vec)=([],[],[[0,0,-1]]);
     visited[0]=1;
     while(size(vec)){
         append(total,vec);