Equal.cong_succ: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/equal.bend as Equal
Lines 54-59 of bend-mathlib@0.8.1.0/equal.bend: https://jend.leeeet.dev/read.txt?path=bend-mathlib@0.8.1.0/equal.bend&start_line=54&end_line=59

import Base

# Equal naturals have equal successors.
law cong_succ:
  for -a: Nat
  for -b: Nat
  for e: {a == b : Nat}
  {1n+a == 1n+b : Nat}

Uses (1):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat