buildspec.yml not found if accent in the path

**Describe the bug**

If the path to a buildspec file contains an accent, then the buildspec file won't be found. By accent I mean the character "é" for example.

**Platform (please complete the following information):**
- OS: Linux x86

Start by reproducing the issue on Linux x86 with a buildspec.yml path containing an accented character such as "é". Trace how the repository locates that buildspec, then verify that the file is found when the path includes the accented character; the payload names no source file or test to begin with.

Written by the indexing model from the issue text.