[SourceKit/CodeFormat] Don't modify multiline string indentation regardless of it being column-aligned or not.

Resolves rdar://problem/61463947

Author: Nathan Hawes

lib/IDE/Formatting.cpp

@@ -2567,6 +2567,12 @@ class CodeFormatter {
   std::pair<LineRange, std::string> indent(unsigned LineIndex,
                                            FormatContext &FC,
                                            StringRef Text) {
+    if (FC.IsInStringLiteral()) {
+      return std::make_pair(
+          LineRange(LineIndex, 1),
+          swift::ide::getTextForLine(LineIndex, Text, /*Trim*/ false).str());
+    }
+
     if (FC.isExact()) {
       StringRef Line = swift::ide::getTextForLine(LineIndex, Text, /*Trim*/true);
       StringBuilder Builder;
@@ -2575,12 +2581,6 @@ class CodeFormatter {
       return std::make_pair(LineRange(LineIndex, 1), Builder.str().str());
     }
 
-    if (FC.IsInStringLiteral()) {
-      return std::make_pair(
-          LineRange(LineIndex, 1),
-          swift::ide::getTextForLine(LineIndex, Text, /*Trim*/ false).str());
-    }
-
     // Take the current indent position of the context, then add the number of
     // indents specified.
     auto LineAndColumn = FC.indentLineAndColumn();

test/swift-indent/basic.swift

@@ -287,6 +287,12 @@ let s = """
             c
     """
 
+print("""
+    foo {
+        bar()
+    }
+    """)
+
 
 // Interpolations shouldn't change how multiline strings are handled.
 //