fix missing TI hash

[w-e-w]

Description

issue #12259

prevent positive prompt TI hash from overriding negative prompt TI hash
as this line of code will be called 2 time

Checklist:

• I have read contributing wiki page
• I have performed a self-review of my own code
• My code follows the style guidelines
• My code passes tests

[AUTOMATIC1111]

it's a very good catch but it the way it is written now will add an extra comma at the beginning

[w-e-w]

it's a very good catch but it the way it is written now will add an extra comma at the beginning

well actually you're right about it being bugged but it doesn't do that
instead it's missing a , in between

test script

# old
d = {}
hashes = ['1-1', '1-2']
d["TI hashes"] = d.get("TI hashes", "") + ", ".join(hashes)
hashes = ['2-1', '2-2']
d["TI hashes"] = d.get("TI hashes", "") + ", ".join(hashes)
print(d["TI hashes"])
# 1-1, 1-22-1, 2-2
#        ^^

# new
d = {}
hashes = ['1-1', '1-2']
if d.get("TI hashes"):
    hashes.append(d.get("TI hashes"))
d["TI hashes"] = ", ".join(hashes)

hashes = ['2-1', '2-2']
if d.get("TI hashes"):
    hashes.append(d.get("TI hashes"))
d["TI hashes"] = ", ".join(hashes)
print(d["TI hashes"])
# 2-1, 2-2, 1-1, 1-2
# fixed