# Multiline function-body source arrives directly on stdin and preserves quotes and backslashes.
stdin injected-body.txt
! exec semedit replace-body --file api/text.go --symbol Message --body -
stderr 'replacement body must remain inside its function wrapper'
cmp api/text.go want/api/text_before.go
stdin body.txt
exec semedit replace-body --file api/text.go --symbol Message --body -
stdout 'Successfully replaced body of Message'
cmp api/text.go want/api/text.go

-- go.mod --
module example.com/replace-body-stdin

go 1.23

-- api/text.go --
package api

func Message(value string) string {
	return ""
}

-- body.txt --
value = value + "!"
return value + ` "quoted" \\ slash`
-- injected-body.txt --
return value
}
func Injected() {

-- want/api/text_before.go --
package api

func Message(value string) string {
	return ""
}

-- want/api/text.go --
package api

func Message(value string) string {
	value = value + "!"
	return value + ` "quoted" \\ slash`
}