ves regtests: reduce by one more (#995) (#997)

Co-authored-by: Omar Valsson <[email protected]>

Author: carlocamilloni

regtest/ves/rt-bf-combined/bf.derivs.data.reference

@@ -47,7 +47,7 @@ VES_OUTPUT_BASISFUNCTIONS ...
  TARGET_DISTRIBUTION3=bf_t3
  TARGET_DISTRIBUTION4=bf_t4
  TARGET_DISTRIBUTION5=bf_t5
- FORMAT_VALUES_DERIVS=%13.5f
+ FORMAT_VALUES_DERIVS=%13.4f
  FORMAT_TARGETDIST_AVERAGES=%13.6f
 ... VES_OUTPUT_BASISFUNCTIONS
 
@@ -72,7 +72,7 @@ VES_OUTPUT_BASISFUNCTIONS ...
  TARGET_DISTRIBUTION3=bf2_t3
  TARGET_DISTRIBUTION4=bf2_t4
  TARGET_DISTRIBUTION5=bf2_t5
- FORMAT_VALUES_DERIVS=%13.5f
+ FORMAT_VALUES_DERIVS=%13.4f
  FORMAT_TARGETDIST_AVERAGES=%13.6f
 ... VES_OUTPUT_BASISFUNCTIONS