Fix SE(2) inverse (AtsushiSakai#925)

* Fix SE(2) inverse

* Add missing ]

Author: JeffLIrion

SLAM/GraphBasedSLAM/graphslam/pose/se2.py

@@ -136,8 +136,8 @@ def inverse(self):
 
         """
         return PoseSE2([-self[0] * np.cos(self[2]) - self[1] * np.sin(self[2]),
-                        self[0] * np.sin(self[2]) - self[1] * np.cos(
-                            [self[2]])], -self[2])
+                        self[0] * np.sin(self[2]) - self[1] * np.cos(self[2])],
+                        -self[2])
 
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