Kitware Robot authored Feb 01, 2018 and Brad King committed Feb 01, 2018

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit 04fcc449646eb2ff3d701986946a1db60b2161b7 (master).

Upstream Shortlog
-----------------

Ben Boeckel (11):
      ba270398 SystemToolsAppendComponents: move strings when building components
      cfd0f1e6 JoinPath: push back as a character
      6770cb3e GetFilenameName: optionally don't search for \ on non-Windows
      22b189b0 ConvertToUnixSlashes: remove escaped space logic
      342d69a4 ConvertToUnixSlashes: short-circuit on hasDoubleSlash
      5dd87350 ConvertToUnixSlashes: remove pos1
      3b46b7c0 ConvertToUnixSlashes: bail early on empty paths
      55d1d6ab CollapseFullPath: reserve space for components
      68807138 CollapseFullPath: prefer .empty() to .length() == 0
      71a6de42 CollapseFullPath: refactor the overloads to share implementations
      318550c7 CheckCollapsePath: add more test cases