Update conf.dat

Author: ariyle

sample/dipole-example/conf.dat

@@ -6,5 +6,5 @@
  tindex_stop = 202664,		 ! time slice to stop at. set to a large number to process all
  output_format = 1,		 ! output format. 2=file per slice, 1=all slices in one file
  append_to_files = 1 		 ! for cont. format set 1 to append to existing files, anything else to start at the beginning
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