Add test case for listing of designs with UTF-8 metadata

test/176_utf8_design_list.cfg

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+# This config contains UTF-8-encoded elements used correctly, and a simple colored box design.
+
+BOX designA
+
+author "沐宸"   # in a value
+
+designer "John Doe"
+
+𝕂𝕖𝕪𝕨𝕠𝕣𝕕 "value"  # in a keyword
+Mix𝕖𝕕 "value"
+
+sample
+    ┏━ 沐宸 若汐 ━┓
+    ┃             ⧹
+    ┃             ╱
+    ┗━━━━━━━━━━━━━┛
+ends
+
+# Monochrome sample (with UTF-8):
+# ┏━ 沐宸 若汐 ━┓
+# ┃             ⧹
+# ┃             ╱
+# ┗━━━━━━━━━━━━━┛
+
+shapes {
+     n (" 沐宸 若汐 ")
+     nw ("┏")
+     nnw ("━")
+     nne ("━")
+     ne ("┓")
+     e ("┃")
+     w ("⧹", "╱")
+     se ("┗")
+     s ("━")
+     sw ("┛")
+}
+
+elastic (
+    nnw, nne, e, w, s
+)
+
+padding {
+    horiz 1
+}
+
+replace "ä" with "ö"
+reverse "ö" to "ä"
+
+END designA
+
+
+
+BOX designB
+
+author "John Doe"
+
+designer "沐宸"
+
+revision "1.0.4-RC1"
+revdate  "May 4, 2023 (Pondělí 20:16h)"
+
+sample
+    shape
+ends
+
+shapes {
+     w ("shape")
+}
+
+elastic (
+    n, e, w, s
+)
+
+END designB

test/176_utf8_design_list.txt

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+:ARGS
+-f 176_utf8_design_list.cfg -l
+:INPUT
+:OUTPUT-FILTER
+:EXPECTED
+2 Available Styles in "176_utf8_design_list.cfg":
+-------------------------------------------------
+
+designA
+John Doe, coded by 沐宸:
+
+    ┏━ 沐宸 若汐 ━┓
+    ┃             ⧹
+    ┃             ╱
+    ┗━━━━━━━━━━━━━┛
+
+
+designB
+沐宸, coded by John Doe:
+
+    shape
+
+
+:EOF