i'm just curious; does anyone know why files that are pending to be integrated are read-only?

for example, i have a beta and a development tree. i make a fix in beta, and submit it. i then use `p4 integrate -r -b betaBranch //.../foo.bar', then `p4 resolve -am' to get my change ready for the development branch. foo.bar is checked out, but it is read-only. after the resolve is done, i realize i'd really like to make one last tweak to foo.bar before submitting it.

would it hurt anything if i chmoded the file to be read-write, and then edited it, before i submitted it? it seems like it'd be okay, since i could have done `p4 resolve' and then edited the merge before accepting. but, since the file is read-only, i'm nervous. last time, i chickened out and did the submit as-is, and then immediately edit/submitted it after.

thanks for any insight or advice!

- - sam