[wic][PATCH 2/5] ksparser: fix crash on out-of-range overhead factor

[Trevor Woerner <twoerner@gmail.com>]

overheadtype() rejects a factor below 1.0, but the error path read

    raise ArgumentTypeError("Overhead factor should be > 1.0" % arg)

The message string carries no %-placeholder, so the `% arg`
interpolation itself raised TypeError ("not all arguments converted
during string formatting") before the ArgumentTypeError could be
constructed. Every out-of-range value (0.0, 0.5, -1.0, -inf) crashed
with an opaque TypeError instead of the intended argument error.

Add the missing placeholder so the offending value is reported and the
correct ArgumentTypeError is raised.

AI-Generated: codex/claude-opus 4.8 (xhigh)
Signed-off-by: Trevor Woerner <twoerner@gmail.com>
---
 src/wic/ksparser.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/wic/ksparser.py b/src/wic/ksparser.py
index 24c7015b336d..a73ae56cd196 100644
--- a/src/wic/ksparser.py
+++ b/src/wic/ksparser.py
@@ -99,7 +99,7 @@ def overheadtype(arg):
         raise ArgumentTypeError("Invalid value: %r" % arg)
 
     if result < 1.0:
-        raise ArgumentTypeError("Overhead factor should be > 1.0" % arg)
+        raise ArgumentTypeError("Overhead factor should be > 1.0, not %r" % arg)
 
     return result
 
-- 
2.50.0.173.g8b6f19ccfc3a