two tostring() values are summed, not combined in eval expression

[ronja-ui]

Describe the bug

Currently eval expressions sums two tostring() values instead of combining them together.

Expected behavior

The following should return 28, not 10:

...| eval n=tostring(2)+tostring(8)

However, this should return 10, not 28 (and currently works in that way):

...| eval x="2", y="8"
| eval sum=x+y

How to reproduce

See the examples above

Screenshots

Software version

pth_10 version: 12.1.1

Desktop (please complete the following information if relevant):

• OS:
• Browser:
• Version:

Additional context