Allow arbitrary function names #1101

Job	Run time
Format	13s
Build ubuntu stable	15s
Build ubuntu nightly	15s
Build windows stable	51s
Build windows nightly	30s
Build macos stable	57s
Build macos nightly	33s
Clippy ubuntu	18s
Clippy windows	1m 30s
OTP 26 / Elixir 1.16 / Rust stable / OS macos	1s
Clippy macos	56s
OTP 26 / Elixir 1.16 / Rust stable / OS windows	10s
OTP 26 / Elixir 1.16 / Rust stable / OS ubuntu	1s
OTP 26 / Elixir 1.16 / Rust nightly / OS macos	1s
OTP 26 / Elixir 1.16 / Rust nightly / OS windows	55s
OTP 26 / Elixir 1.16 / Rust nightly / OS ubuntu	1m 14s
OTP 26 / Elixir 1.15 / Rust stable / OS macos	1s
OTP 26 / Elixir 1.15 / Rust stable / OS windows	1m 12s
OTP 26 / Elixir 1.15 / Rust stable / OS ubuntu	1m 7s
OTP 26 / Elixir 1.15 / Rust nightly / OS macos	1s
OTP 26 / Elixir 1.15 / Rust nightly / OS windows	1m 12s
OTP 26 / Elixir 1.15 / Rust nightly / OS ubuntu	1m 9s
OTP 25 / Elixir 1.15 / Rust stable / OS macos	1s
OTP 25 / Elixir 1.15 / Rust stable / OS windows	1m 12s
OTP 25 / Elixir 1.15 / Rust stable / OS ubuntu	1m 24s
OTP 25 / Elixir 1.15 / Rust nightly / OS macos	1m 10s
OTP 25 / Elixir 1.15 / Rust nightly / OS windows	1m 10s
OTP 25 / Elixir 1.15 / Rust nightly / OS ubuntu	1m 25s
OTP 24 / Elixir 1.14 / Rust stable / OS macos	1m 10s
OTP 24 / Elixir 1.14 / Rust stable / OS windows	1m 12s
OTP 24 / Elixir 1.14 / Rust stable / OS ubuntu	1m 26s
OTP 24 / Elixir 1.14 / Rust nightly / OS macos	1m 18s
OTP 24 / Elixir 1.14 / Rust nightly / OS windows	1m 14s
OTP 24 / Elixir 1.14 / Rust nightly / OS ubuntu	1m 25s
	27m 29s

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