Clean up line breaks in tests.

See https://github.com/jensengroup/propka-3.1/issues/43

tests/test_basic_regression.py

@@ -22,7 +22,8 @@ MAX_ERR_DECIMALS = 2
 TEST_DIR = Path("tests")
 # Location for test PDBs
 PDB_DIR = Path("pdb")
-# Location for results for comparing output (allow running from tests/ and ../tests/)
+# Location for results for comparing output (allow running from tests/ and
+# ../tests/)
 RESULTS_DIR = Path("tests/results")
 if not RESULTS_DIR.is_dir():
     _LOGGER.warning("Switching to sub-directory")
@@ -47,7 +48,8 @@ def get_test_dirs():
             if test_path.is_dir():
                 path_dict[key] = test_path
             else:
-                errstr = "Can't find %s test files in %s" % (key, [TEST_DIR / path, path])
+                errstr = ("Can't find %s test files in %s"
+                          % (key, [TEST_DIR / path, path]))
                 raise FileNotFoundError(errstr)
     return path_dict
 
@@ -63,11 +65,12 @@ def run_propka(options, pdb_path, tmp_path):
     options += [str(pdb_path)]
     args = propka.lib.loadOptions(options)
     try:
-        _LOGGER.warning("Working in tmpdir %s because of PROPKA file output; need to fix this.",
-                        tmp_path)
+        _LOGGER.warning("Working in tmpdir %s because of PROPKA file output; "
+                        "need to fix this.", tmp_path)
         cwd = Path.cwd()
         os.chdir(tmp_path)
-        molecule = propka.molecular_container.Molecular_container(str(pdb_path), args)
+        molecule = propka.molecular_container.Molecular_container(
+            str(pdb_path), args)
         molecule.calculate_pka()
         molecule.write_pka()
     finally:
@@ -103,9 +106,11 @@ def compare_output(pdb, tmp_path, ref_path):
                 match = re.search(r'([0-9]+\.[0-9]+)', line)
                 value = float(match.group(0))
                 test_data.append(value)
-    errstr = "Error exceeds maximum allowed value (%d decimal places)" % MAX_ERR_DECIMALS
-    assert_almost_equal(test_data, ref_data, decimal=MAX_ERR_DECIMALS,
-                        err_msg=errstr, verbose=True)
+    errstr = ("Error exceeds maximum allowed value (%d decimal places)"
+              % MAX_ERR_DECIMALS)
+    assert_almost_equal(
+        test_data, ref_data, decimal=MAX_ERR_DECIMALS, err_msg=errstr,
+        verbose=True)
 
 
 @pytest.mark.parametrize("pdb, options", [