python: Fix multiline quotes in a single line

An example case,
```python
mem_side_port = RequestPort(
    "This port sends requests and " "receives responses"
)
```

This is the residue of running the python formatter.
This is done by finding all tokens matching the regex `"\s"(?![.;"])`
and manually replacing them by empty strings.

Change-Id: Icf223bbe889e5fa5749a81ef77aa6e721f38b549
Signed-off-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/66111
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>

src/dev/amdgpu/AMDGPU.py

@@ -73,7 +73,7 @@ class AMDGPUDevice(PciDevice):
     rom_binary = Param.String("ROM binary dumped from hardware")
     trace_file = Param.String("MMIO trace collected on hardware")
     checkpoint_before_mmios = Param.Bool(
-        False, "Take a checkpoint before the" " device begins sending MMIOs"
+        False, "Take a checkpoint before the device begins sending MMIOs"
     )
 
     # Specific to Vega10: Vega10 has two SDMA engines these do not have any