old_contents: # coding=utf-8
  
  import os, sys
  sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
  
  import re
  version_regex = re.compile(r'^\d+\.\d+')
  
  import lasio.las_version
  
  
  def test_verify_default_vcs_tool():
      result = lasio.las_version._get_vcs_version()
      assert version_regex.match(result) 
  
  def test_non_existant_vcs_tool():
      version_cmd = ["gt", "describe", "--tags", "--match", "v*"]
      result = lasio.las_version._get_vcs_version(version_cmd)
      assert result == ""
  
  
  def test_explicit_existant_vcs_tool():
      version_cmd = ["git", "describe", "--tags", "--match", "v*"]
      result = lasio.las_version._get_vcs_version(version_cmd)
      assert version_regex.match(result) 
  
new_contents: # coding=utf-8
  
  import os, sys
  sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
  
  import re
  version_regex = re.compile(r'^\d+\.\d+')
  
  import lasio.las_version
  
  
  def test_verify_default_vcs_tool():
      result = lasio.las_version._get_vcs_version()
      assert version_regex.match(result) 
  
  def test_non_existent_vcs_tool():
      version_cmd = ["gt", "describe", "--tags", "--match", "v*"]
      result = lasio.las_version._get_vcs_version(version_cmd)
      assert result == ""
  
  
  def test_explicit_existent_vcs_tool():
      version_cmd = ["git", "describe", "--tags", "--match", "v*"]
      result = lasio.las_version._get_vcs_version(version_cmd)
      assert version_regex.match(result) 
  
subject: Fix spelling error