fix: handle errors in git utils convert_octal_to_utf8 (#817)

Author: cseickel

lua/neo-tree/git/utils.lua

@@ -48,12 +48,18 @@ M.get_repository_root = function(path, callback)
   end
 end
 
+local convert_octal_char = function(octal)
+  return string.char(tonumber(octal, 8))
+end
+
 M.octal_to_utf8 = function(text)
   -- git uses octal encoding for utf-8 filepaths, convert octal back to utf-8
-  text = text:gsub("\\([0-7][0-7][0-7])", function(octal)
-    return string.char(tonumber(octal, 8))
-  end)
-  return text
+  local converted, success = pcall(string.gsub, text, "\\([0-7][0-7][0-7])", convert_octal_char)
+  if success then
+    return converted
+  else
+    return text
+  end
 end
 
 return M