Correctly highlight object constant overrides

[ironsheep]

Is your feature request related to a problem? Please describe.
Highlight this correctly

'' We try to positionally match the NeoGeo mini controller (NESW is CDBA)
'' Therefore, A = BT3, B = BT2, C = BT0 or BT6, D = BT1 or BT7
usb: "usbnew" | ACTIVITY_LED = -1, ERROR_LED = -1, USB_BASE_PIN = USB0_BASEPIN, OVERLAP_MEMORY = true, ...
                EMUPAD_MAX_DEV = 2, ...
                EMUPAD_UP_BIT = 0,EMUPAD_DOWN_BIT = 1,EMUPAD_LEFT_BIT = 2,EMUPAD_RIGHT_BIT = 3, ...
                EMUPAD_BT0_BIT = 6, EMUPAD_BT1_BIT = 7, EMUPAD_BT2_BIT = 5, EMUPAD_BT3_BIT = 4, ...
                EMUPAD_BT4_BIT = -1, EMUPAD_BT5_BIT = -1, EMUPAD_BT6_BIT = 6, EMUPAD_BT7_BIT = 7,  ...
                EMUPAD_BT8_BIT = 9, EMUPAD_BT9_BIT = 8, ...
                EMUPAD_KB_BT0 = $06, EMUPAD_KB_BT1 = $19, EMUPAD_KB_BT2 = $1B, EMUPAD_KB_BT3 = $1D, ...
                EMUPAD_KB_BT4 = 0, EMUPAD_KB_BT5 = 0, EMUPAD_KB_BT6 = 0, EMUPAD_KB_BT7 = 0, ...
                EMUPAD_KB_BT8 = $2A, EMUPAD_KB_BT9 = $28

Describe the solution you'd like
Line continuation is messing with later highlights throughout file

Describe alternatives you've considered
N/A

Additional context
This is a newer feature of spin2 language

REF: https://github.com/IRQsome/NeoYume/blob/slot-interleave/neoyume_input.spin2