fix unreachable code branches

Author: dlawin

data_diff/hashdiff_tables.py

@@ -92,7 +92,7 @@ def _validate_and_adjust_columns(self, table1: TableSegment, table2: TableSegmen
  # Update schemas to minimal mutual precision
  col1 = table1._schema[c1]
  col2 = table2._schema[c2]
- if isinstance(col1, PrecisionType) and isinstance(col2, PrecisionType):
+ if isinstance(col1, PrecisionType):
  if strict and not isinstance(col2, PrecisionType):
  raise TypeError(f"Incompatible types for column '{c1}': {col1} <-> {col2}")
 
@@ -104,7 +104,7 @@ def _validate_and_adjust_columns(self, table1: TableSegment, table2: TableSegmen
  table1._schema[c1] = attrs.evolve(col1, precision=lowest.precision, rounds=lowest.rounds)
  table2._schema[c2] = attrs.evolve(col2, precision=lowest.precision, rounds=lowest.rounds)
 
- elif isinstance(col1, (NumericType, Boolean)) and isinstance(col2, (NumericType, Boolean)):
+ elif isinstance(col1, (NumericType, Boolean)):
  if strict and not isinstance(col2, (NumericType, Boolean)):
  raise TypeError(f"Incompatible types for column '{c1}': {col1} <-> {col2}")