smithy format removes intended newlines in text block

[mky4]

Example

Before running smithy format:

@pattern(
"""
(^\
((25[0-5]|(2[0-4]|1[0-9]|[1-9]|)[0-9])(\\.(?!$)|$)){4}\
$)\
|\
(^\
(\
([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}\
|([0-9a-fA-F]{1,4}:){1,7}:\
|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}\
|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}\
|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}\
|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}\
|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}\
|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})\
|:((:[0-9a-fA-F]{1,4}){1,7}|:)\
|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}\
|::(ffff(:0{1,4}){0,1}:){0,1}\
((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}\
(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\
|([0-9a-fA-F]{1,4}:){1,4}\
:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}\
(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\
)\
$)
"""
)
string Ipv4Orv6

After running smithy format, it gets collapsed into:

@pattern(
    """
    (^((25[0-5]|(2[0-4]|1[0-9]|[1-9]|)[0-9])(\.(?!$)|$)){4}$)|(^(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))$)
    """
)
string Ipv4Orv6

Expected behavior

The formatter should preserve intentional newlines inside the text block, as they are part of the intended structure.

References

• Smithy IDL Specification – Escapes in Text Blocks