debug param save works, bull/bear hitbox

debug_params.gd

@@ -433,12 +433,22 @@ func save() -> void:
 		if p["value"] == p["default"]:
 			continue
 		var re := RegEx.new()
+		var literal := ""
 		if p["type"] == TYPE_FLOAT:
 			re.compile('(_reg_f\\("[^"]+",\\s*"%s",\\s*)([-\\d.e]+)' % key)
-			src = re.sub(src, "$1" + _fmt_float(p["value"] as float))
+			literal = _fmt_float(p["value"] as float)
 		else:
 			re.compile('(_reg_b\\("[^"]+",\\s*"%s",\\s*)(true|false)' % key)
-			src = re.sub(src, "$1" + ("true" if bool(p["value"]) else "false"))
+			literal = "true" if bool(p["value"]) else "false"
+		var m := re.search(src)
+		if m == null:
+			push_warning("DP.save: no _reg_ line found for '%s' — skipped" % key)
+			continue
+		# Splice the value in by index rather than RegEx.sub(): sub()'s replacement
+		# string parses "$n" as a backreference, so "$1"+"12.5" becomes "$112.5"
+		# (group 112 → PCRE2 error → mangled output). Indexed splice inserts the
+		# literal verbatim, exactly the value the user entered.
+		src = src.substr(0, m.get_start(2)) + literal + src.substr(m.get_end(2))
 		p["default"] = p["value"]
 
 	var wfile := FileAccess.open(path, FileAccess.WRITE)
@@ -449,8 +459,12 @@ func save() -> void:
 	wfile.close()
 
 
+# Godot's String % operator has no "g" conversion — "%.6g" % v slips past the
+# compiler (v is not const) but emits the literal "%.6g" at runtime, which would be
+# written straight into the source. "%s" gives the shortest round-tripping form,
+# matching the value the user entered; the guard keeps it a float literal.
 func _fmt_float(v: float) -> String:
-	var s := "%.6g" % v
+	var s := "%s" % v
 	if not ("." in s or "e" in s):
 		s += ".0"
 	return s