Expect deletes ^H after spawn bash -c - bash

Question

I have an expect script that grabs a bunch of configs and outputs them to separate files. The files though have a bunch of ^H's though I'd like to clean out. I used the CtrlV+CtrlH to put it in the expect script, but when it runs it just does it. The sed works fine in bash, but fails in expect. How can I delete the ^H from the files?
foreach host $ip {
set output [ open "$host" w ]
set timeout 2
spawn ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 -o "StrictHostKeyChecking no" -oHostKeyAlgorithms=+ssh-dss $username#$host
expect {
eof {wait; spawn telnet $host;
expect "ame:";
send "$username\r"}
}
expect "word:"
send "$password\r"
expect "#"
send "$command\r"
sleep 2
expect {
"ore--" { send -- " "; puts $output $expect_out(buffer); exp_continue}
"#" {send -- "exit\r"}
}
puts $output $expect_out(buffer)
close $output
close
}
foreach host $ip {
spawn bash -c "sed -i 's/^H//gi; s/--More--//g' ./$host"
}
close
Here's what it looks like when it runs:
spawn bash -c sed -i 's//gi; s/--More--//g' ./192.168.50.1
spawn bash -c sed -i 's//gi; s/--More--//g' ./192.168.51.1
spawn bash -c sed -i 's//gi; s/--More--//g' ./192.168.52.1

Answer 1

Assuming an ASCII-based locale, this should work:
tr -d '\010' < file > file.new
\010 is octal 8, which is the ASCII equivalent of backspace.

Answer 2

For calling out to sed, since you don't need to interact with the process, you can use exec instead:
foreach host $ip {
exec sed -i {s/^H//gi; s/--More--//g} ./$host
}
Using Tcl's version of single quotes, which are {}