Update ANSI_ESCAPE_SEQUENCE comments

Author: edvilme

Lib/_pyrepl/utils.py

@@ -20,7 +20,19 @@
 
 
 ANSI_ESCAPE_SEQUENCE = re.compile(
-    r"\x1b(?:\[[ -@]*[A-~]|\][^\x1b\x07]*(?:\x07|\x1b\\))"
+    r"""
+    \x1b
+    (?:
+        # CSI: ESC [ followed by parameter/intermediate bytes and a final byte.
+        # For example, ESC [ 31 m ("\x1b[31m") selects red foreground text.
+        \[ [ -@]* [A-~]
+        |
+        # OSC: ESC ] followed by a payload terminated by BEL or ST (ESC \).
+        # For example, ESC ] 0 ; title BEL ("\x1b]0;title\x07") sets the title.
+        \] [^\x1b\x07]* (?: \x07 | \x1b\\ )
+    )
+    """,
+    re.X,
 )
 ZERO_WIDTH_BRACKET = re.compile(r"\x01.*?\x02")
 ZERO_WIDTH_TRANS = str.maketrans({"\x01": "", "\x02": ""})