match formatting standards

src/packaging/licenses/__init__.py

@@ -55,7 +55,7 @@ def canonicalize_license_expression(
  raw_license_expression: str,
 ) -> str | NormalizedLicenseExpression:
  if raw_license_expression == "":
- message = f"Invalid license expression: {raw_license_expression}"
+ message = f"Invalid license expression: {raw_license_expression!r}"
  raise InvalidLicenseExpression(message)
 
  license_refs = {
@@ -84,7 +84,7 @@ def canonicalize_license_expression(
  elif token == "with":
  python_tokens.append("or")
  elif token == "(" and python_tokens and python_tokens[-1] not in {"or", "and"}:
- message = f"Invalid license expression: {raw_license_expression}"
+ message = f"Invalid license expression: {raw_license_expression!r}"
  raise InvalidLicenseExpression(message)
  else:
  python_tokens.append(token)
@@ -96,7 +96,7 @@ def canonicalize_license_expression(
  result = True
 
  if result is not False:
- message = f"Invalid license expression: {raw_license_expression}"
+ message = f"Invalid license expression: {raw_license_expression!r}"
  raise InvalidLicenseExpression(message) from None
 
  # Take a final pass to check for unknown licenses/exceptions.
@@ -108,7 +108,7 @@ def canonicalize_license_expression(
 
  if normalized_tokens and normalized_tokens[-1] == "WITH":
  if token not in EXCEPTIONS:
- message = f"Unknown license exception: {token}"
+ message = f"Unknown license exception: {token!r}"
  raise InvalidLicenseExpression(message)
 
  normalized_tokens.append(EXCEPTIONS[token]["id"])
@@ -122,12 +122,12 @@ def canonicalize_license_expression(
 
  if final_token.startswith("licenseref-"):
  if not license_ref_allowed.match(final_token):
- message = f"Invalid licenseref: {final_token}"
+ message = f"Invalid licenseref: {final_token!r}"
  raise InvalidLicenseExpression(message)
  normalized_tokens.append(license_refs[final_token] + suffix)
  else:
  if final_token not in LICENSES:
- message = f"Unknown license: {final_token}"
+ message = f"Unknown license: {final_token!r}"
  raise InvalidLicenseExpression(message)
  normalized_tokens.append(LICENSES[final_token]["id"] + suffix)