mq: add ".hgsubstate" to patch target list only if it is not listed up yet If ".hgsubstate" is already listed up as one of commit targets, qnew put diff of ".hgsubstate" twice into the patch file stored under ".hg/patches". It causes rejections at applying such patches. Other than the case like in added test script, this can also occur when qnew is executed just after rolling back the committing updated ".hgsubstate". This patch checks whether ".hgsubstate" is already listed up as one of commit targets, and put it into the appropriate list only if it is not listed up yet.