Added a pre-commit config file and reformatted all the files accordingly by using it.

examples/cylinder_Bscan_2D.in

@@ -12,4 +12,4 @@
 #rx_steps: 0.002 0 0
 
 #box: 0 0 0 0.240 0.170 0.002 half_space
-#cylinder: 0.120 0.080 0 0.120 0.080 0.002 0.010 pec
+#cylinder: 0.120 0.080 0 0.120 0.080 0.002 0.010 pec