Update README.md

Co-authored-by: Ralf Jung <post@ralfj.de>

Author: landaire

README.md

@@ -228,8 +228,8 @@ environment variable:
    This can be used to find which parts of your program are executing slowly under Miri.
    The profile is written out to a file with the prefix `<name>`, and can be processed
    using the tools in the repository https://github.com/rust-lang/measureme.
-* `-Zmiri-panic-on-unsupported` will makes some forms of unsupported functionality
-  such as FFI and unsupported syscalls panic within the context of the emulated
+* `-Zmiri-panic-on-unsupported` will makes some forms of unsupported functionality,
+  such as FFI and unsupported syscalls, panic within the context of the emulated
   application instead of raising an error within the context of Miri (and halting
   execution). Note that code might not expect these operations to ever panic, so
   this flag can lead to strange(mis)behavior.