fish vs bash

fishbash.txt

# Necessary establishing information...

fish$ fish --version
fish, version 2.7.1

# Let's create a file that contains newlines.

fish$ cat > testfile.txt
foo
bar

# fish uses (command) to put stuff on the command line

fish$ echo (cat testfile.txt)
foo bar

# Hmm. We've lost the newlines. I wonder what bash does.

fish$ bash
bash$ bash --version
$ bash --version
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin18)
Copyright (C) 2007 Free Software Foundation, Inc.
bash$ echo $(cat testfile.txt)
foo bar

# Well that's the same, what about with quotes?

bash$ echo "$(cat testfile.txt)"
foo
bar

# Ah ha! Let's try that in fish!

bash$ exit
fish$ echo "(cat testfile.txt)"
(cat testfile.txt)

# Darn.