gh-139246: zero-width word paste can be wrong in default repl (GH-139254)

Signed-off-by: yihong0618 <zouzou0208@gmail.com>
Co-authored-by: grayjk <grayjk@gmail.com>

Lib/_pyrepl/utils.py

@@ -63,6 +63,12 @@ class ColorSpan(NamedTuple):
 def str_width(c: str) -> int:
     if ord(c) < 128:
         return 1
+    # gh-139246 for zero-width joiner and combining characters
+    if unicodedata.combining(c):
+        return 0
+    category = unicodedata.category(c)
+    if category == "Cf" and c != "\u00ad":
+        return 0
     w = unicodedata.east_asian_width(c)
     if w in ("N", "Na", "H", "A"):
         return 1