LISP routines for commenting

[Alex Gusarov]

Hello,

I want to implement some lisp functions for the following:
1. Insert comment - when mark some lines of code and using it, insert
ins-comments, like this:

before:

l = []
l.append(1)

then mark it and use ins-func, after:

# ins > <username>, <current date and time>
l = []
l.append(1)
# ins < <username>, <current date and time>

Please, help me with some general code, thanks!

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Best regards, Alex Gusarov