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>

configs/common/Options.py

@@ -217,7 +217,7 @@ def addNoISAOptions(parser):
         "--maxtime",
         type=float,
         default=None,
-        help="Run to the specified absolute simulated time in " "seconds",
+        help="Run to the specified absolute simulated time in seconds",
     )
     parser.add_argument(
         "-P",
@@ -691,7 +691,7 @@ def addSEOptions(parser):
         "-o",
         "--options",
         default="",
-        help="""The options to pass to the binary, use " "
+        help="""The options to pass to the binary, use
                               around the entire string""",
     )
     parser.add_argument(