ph3nac

<div class="code-block-container"><pre class="language-shell"><code class="language-shell">zsh
$echo $HOME:abc
/userbc

bash
$echo $HOME:abc
/user:abc
</code></pre></div>

zshの<a href="https://zsh.sourceforge.io/Doc/Release/Expansion.html#Modifiers" target="_blank" rel="nofollow noopener noreferrer">modifires</a>という機能みたい

<a href="https://zsh.sourceforge.io/Intro/intro_12.html#:~:text=Also%2C%20csh%2Dstyle%20%3A%20modifiers%20may%20be%20appended%20to%20a%20parameter%20substitution" target="_blank" rel="nofollow noopener noreferrer">csh-style</a>に由来するみたい