equal sign required after python silly argparse

https://stackoverflow.com/questions/16174992/cant-get-argparse-to-read-quoted-string-with-dashes-in-it

README.adoc

@@ -7238,7 +7238,7 @@ less "$(./getvar -a aarch64 run_dir)/trace.txt"
 List all available debug flags:
 
 ....
-./run -a aarch64 -G --debug-help -g
+./run -a aarch64 -G='--debug-help' -g
 ....
 
 but to understand most of them you have to look at the source code:
@@ -8210,7 +8210,7 @@ Pass options to the `gem5` executable itself:
 * get help:
 +
 ....
-./run -G '-h' -g
+./run -G='-h' -g
 ....
 
 === gem5 exit after a number of instructions