bash: `shell-expand-line`

TLDR; <Alt-Ctrl-e> expands command line without running it

Bash's shell expansion does things like history, parameter, and brace expansion.

To type <Meta-Ctrl-e> try:

• <Esc><Ctrl-e> (since <Esc> metafies next character)
• <Alt-Ctrl-e> (since <Meta> is usually mapped to <Alt>)