Fix indentation of multiline raw string literals with --indent-strings

[Copilot]

The indentStrings option was silently ignored for raw multiline string literals (#"""..."""#, ##"""..."""##), always stripping their content indentation regardless of the setting.

Root cause: The indentStrings post-processing block matched only .startOfScope("\"\"\"") — the exact plain-""" token — missing raw variants like #""", ##""", etc.

Fix:

• Replace forEach(.startOfScope("\"\"\"")) with forEachToken(where:) matching any multiline string start-of-scope that contains " — this covers all hash-prefixed string delimiters while correctly excluding multiline regex literals (#/.../#, which also satisfy isMultilineStringDelimiter)

- formatter.forEach(.startOfScope("\"\"\"")) { stringStartIndex, _ in
+ formatter.forEachToken(where: {
+     // Match multiline string literals (""", #""", ##""", etc.) but not multiline regex literals (#/.../#)
+     $0.isStartOfScope && $0.isMultilineStringDelimiter && $0.string.contains("\"")
+ }) { stringStartIndex, _ in

Tests added (mirroring existing indentStrings coverage for non-raw strings):

• indentStrings: true inside a method with #"""
• No-extra-indent when #""" is on its own line (omitted return)
• Top-level indent/unindent with #"""
• Double-hash delimiter ##"""..."""##

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.29%. Comparing base (36c910a) to head (df3fea4).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2484      +/-   ##
===========================================
- Coverage    95.30%   95.29%   -0.01%     
===========================================
  Files          167      167              
  Lines        25346    25349       +3     
===========================================
+ Hits         24156    24157       +1     
- Misses        1190     1192       +2     

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