Prettier 3.6.2
Playground link

--parser angular

Input:

<c [a]="`1
2`" />

Output:

<c
  [a]="
    `1
2`
  "
/>

Expected output:

<c
  [a]="`1
2`"
/>

Why?

Prettier seems to move multi-line template literals assigned as attribute values into their own lines and indents them forward, i.e., formatting this 👇,

key="value"

...as 👇,

key="
  value
"

While this works well for 1) long template literals that exceed the print width and therefore must be wrapped and 2) more "complicated" expressions with, e.g., several parts +ed together, I think Prettier should leave "simple" multi-line template literals as-is. It looks better and is more space-efficient this way.

This would also be consistent with how Prettier formats TypeScript/TSX, rewriting this 👇,

<c a={`1
2`} />

...as 👇,

<c
  a={`1
2`}
/>;

...instead of something like 👇,

<c
  a={
    `1
2`
  }
/>;