Put a # comment between backslash-continued lines and the command ends
there. The rest of the lines run as new commands.
$ cat c.sh
#!/usr/bin/env bash
echo one \
# a comment
two three
$ bash c.sh
one
c.sh: line 4: two: command not found
The continuation joins the comment onto the command line, and # then
comments out everything to the end of that line, trailing backslash included.
So the chain breaks at the comment. Move the comment above the command
instead.
I found this in a long qemu-system-x86_64 invocation, where I had annotated
the -cpu flags in place. Because the line began with exec, the truncated
command replaced the shell and the leftover flags never ran at all. No error,
just a VM missing every argument after the comment.
