Revert "[4.0] Fix multi-line string syntax coloring issues" (#10634) (#10653)

Author: nkcsgexi

lib/IDE/SyntaxModel.cpp

@@ -206,15 +206,6 @@ SyntaxModelContext::SyntaxModelContext(SourceFile &SrcFile)
         break;
       }
 
-      case tok::unknown: {
-        if (Tok.getRawText().startswith("\"")) {
-          // This is an invalid string literal
-          Kind = SyntaxNodeKind::String;
-          break;
-        }
-        continue;
-      }
-
       default:
         continue;
       }

test/IDE/coloring.swift

@@ -227,15 +227,6 @@ func f(x: Int) -> Int {
   // CHECK: <str>"This is string </str>\<anchor>(</anchor>genFn({(a:<type>Int</type> -> <type>Int</type>) <kw>in</kw> a})<anchor>)</anchor><str> interpolation"</str>
   "This is string \(genFn({(a:Int -> Int) in a})) interpolation"
 
-  // CHECK: <str>"This is unterminated</str>
-  "This is unterminated
-
-  // CHECK: <str>"This is unterminated with ignored \(interpolation) in it</str>
-  "This is unterminated with ignored \(interpolation) in it
-
-  // CHECK: <str>"This is terminated with invalid \(interpolation" + "in it"</str>
-  "This is terminated with invalid \(interpolation" + "in it"
-
   // CHECK: <str>"""
   // CHECK-NEXT: This is a multiline string.
   // CHECK-NEXT: """</str>
@@ -245,19 +236,9 @@ func f(x: Int) -> Int {
 
   // CHECK: <str>"""
   // CHECK-NEXT: This is a multiline</str>\<anchor>(</anchor> <str>"interpolated"</str> <anchor>)</anchor><str>string
-  // CHECK-NEXT: </str>\<anchor>(</anchor>
-  // CHECK-NEXT: <str>"""
-  // CHECK-NEXT: inner
-  // CHECK-NEXT: """</str>
-  // CHECK-NEXT: <anchor>)</anchor><str>
   // CHECK-NEXT: """</str>
   """
       This is a multiline\( "interpolated" )string
-   \(
-   """
-    inner
-   """
-   )
    """
 }
 

test/IDE/unterminated_multiline.swift

@@ -13,6 +13,8 @@
   ]
 }
 {
+  key.offset: 0,
+  key.length: 3,
   key.diagnostic_stage: source.diagnostic.stage.swift.parse,
   key.substructure: [
     {

test/SourceKit/DocumentStructure/mark_edit.swift.response

@@ -29,7 +29,7 @@
 }
 {
   key.offset: 1,
-  key.length: 34,
+  key.length: 36,
   key.diagnostic_stage: source.diagnostic.stage.swift.parse,
   key.syntaxmap: [
     {

test/SourceKit/SyntaxMapData/Inputs/syntaxmap-edit-block-comment.swift

@@ -28,6 +28,8 @@
   ]
 }
 {
+  key.offset: 36,
+  key.length: 0,
   key.diagnostic_stage: source.diagnostic.stage.swift.parse,
   key.syntaxmap: [
   ]