[tesh] read files in utf-8

Previously, system's default encoding was used.

diff --git a/tools/tesh/tesh.py b/tools/tesh/tesh.py
index a37449e..37a7e5a 100755 (executable)
--- a/tools/tesh/tesh.py
+++ b/tools/tesh/tesh.py
@@ -139,7 +139,7 @@ class FileReader(Singleton):
             self.filename_raw = filename
             self.filename = os.path.basename(filename)
             self.abspath = os.path.abspath(filename)
-            self.f = open(self.filename_raw)
+            self.f = open(self.filename_raw, encoding="utf-8")
 
         self.linenumber = 0