Replace non-ASCII characters

apriltag_pose.h

@@ -44,9 +44,9 @@ void estimate_pose_for_tag_homography(
  * used to find a potential second local minima and Orthogonal Iteration is
  * used to refine this second estimate.
  *
- * [1]: E. Olson, “Apriltag: A robust and flexible visual fiducial system,” in
+ * [1]: E. Olson, "Apriltag: A robust and flexible visual fiducial system," in
  *      2011 IEEE International Conference on Robotics and Automation,
- *      May 2011, pp. 3400–3407.
+ *      May 2011, pp. 3400-3407.
  * [2]: Lu, G. D. Hager and E. Mjolsness, "Fast and globally convergent pose
  *      estimation from video images," in IEEE Transactions on Pattern Analysis
  *      and Machine Intelligence, vol. 22, no. 6, pp. 610-622, June 2000.
@@ -77,4 +77,3 @@ double estimate_tag_pose(apriltag_detection_info_t* info, apriltag_pose_t* pose)
 #ifdef __cplusplus
 }
 #endif
-

common/matd.c

@@ -402,7 +402,7 @@ double matd_det_general(const matd_t *a)
     // The determinant of a can be calculated as
     //     epsilon*det(L)*det(U),
     // where epsilon is just the sign of the corresponding permutation
-    // (which is +1 for an even number of permutations and is −1
+    // (which is +1 for an even number of permutations and is -1
     // for an uneven number of permutations).
     double det = mlu->pivsign * detL * detU;