Preserve tab indentation when formatting branches (#2275)

* Initial plan

* Preserve tab indentation when formatting branches

Co-authored-by: bergmeister <9250262+bergmeister@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: bergmeister <9250262+bergmeister@users.noreply.github.com>

Author: Copilot

Rules/PlaceCloseBrace.cs

@@ -278,7 +278,7 @@ private List<CorrectionExtent> GetCorrectionsForBraceShouldHaveNewLineAfter(
             var nextToken = tokens[closeBracePos + 1];
             var closeBraceToken = tokens[closeBracePos];
             var indentation = tokens[closeBracePos - 1].Kind == TokenKind.NewLine
-                ? new String(' ', closeBraceToken.Extent.StartColumnNumber - 1)
+                ? closeBraceToken.Extent.StartScriptPosition.Line.Substring(0, closeBraceToken.Extent.StartColumnNumber - 1)
                 : GetIndentation(tokens, closeBracePos, openBracePos);
 
             // Also remove the whitespace between the close brace and the next token

Tests/Rules/PlaceCloseBrace.tests.ps1

@@ -226,6 +226,25 @@ function Test {
             Invoke-Formatter -ScriptDefinition $def -Settings $settings | Should -Be $expected
         }
 
+        It "Should preserve tab indentation before a close brace" {
+            $def = @'
+if ($true) {
+    $true
+	}	else {
+	    $false
+	}
+'@
+            $expected = @'
+if ($true) {
+    $true
+	}
+	else {
+	    $false
+	}
+'@
+            Invoke-Formatter -ScriptDefinition $def -Settings $settings | Should -Be $expected
+        }
+
         It "Should find a violation for a close brace followed by elseif" {
             $def = @'
 if (Test-Path "blah") {