Unicode Character Misrepresentation

[TeamSPoon]

When running a MeTTa script in SWI-Prolog version 9.3.11, Unicode characters such as "ɑ" (Latin small letter alpha) are not handled correctly in the output. The output is expected to show proper handling of the Unicode character, but instead, it displays an incorrect representation (\u0251) in some cases when using mettalog and metta commands.

Steps to Reproduce:

1. Create a test file with the following contents:

   !(bind! &ex1 (new-space))
   !(add-atom &ex1 (y y (ɑ 0)))
   !(add-atom &ex1 (x z (ɑ 0)))
   !(add-atom &ex1 ((ɑ 0) 1 A))
   
   (= (name $x) (case $x (
     ((ɑ $n) (format-args "ɑ{}" ($n)))
     ($k (format-args "n{}" ($k)))
   )))
   (= (graphviz-triple ($x $p $y))
     (let* (($xn (name $x)) ($pn (name $p)) ($yn (name $y)))
       (format-args "{} -> {} [label=\"{}\"]"
         ($xn $yn $pn)
   )))
   (= (graphviz $space)
     (println! (graphviz-triple (get-atoms $space)))
   )
   !(graphviz &ex1)

2. Run the script with mettalog command:

   mettalog tests/baseline_compat/anti-regression/issues/metta-wam-issue-145/print_graph.metta

Expected Behavior:

The output should display the Unicode character "ɑ" correctly, as in:

ny -> ɑ0 [label="ny"]
nx -> ɑ0 [label="nz"]
ɑ0 -> nA [label="n1"]

Actual Behavior:

The output is displaying a Unicode escape sequence instead of the actual character:

ny -> \u02510 [label="ny"]
nx -> \u02510 [label="nz"]
\u02510 -> nA [label="n1"]

System Information:

• SWI-Prolog version: 9.3.11 for x86_64-linux
• OS: Linux (Debian 12)

Additional Context:

Running the same script using the metta command works as expected and displays the Unicode character "ɑ" correctly, but when using mettalog, the issue occurs. The mettalog output is mishandling the Unicode characters, while metta works fine. The issue may be related to stream encoding settings in mettalog.

[TeamSPoon]

Also need to buffer the output from the answers