gistfile1.txt

$ set > /tmp/a                                                                                            ~
$ export foo=bar                                                                                          ~
$ set > /tmp/b                                                                                            ~
$ diff -a /tmp/{a,b}                                                                                      ~
24c24
< HISTCMD=4816
---
> HISTCMD=4818
36c36
< LINENO=17
---
> LINENO=19
69c69
< RANDOM=25468
---
> RANDOM=30669
73c73
< SECONDS=2477
---
> SECONDS=2491
136a137
> foo=bar