virtuoso layout drc error

V1 enclosure by M1 is 0.005
Extension of M1 line end outside of V1 is 0.05
For V1 enclosed at the 90 degree corner by M1, M1 extension at least along one direction outside V1 is 0.05

对于被 M1 包围在 90 度角上的 V1，M1 在 V1 外部至少沿一个方向的延伸为 0.05

解决办法：将M1一边延长，使M1的90度拐角原理V1的90拐角。