Added test for #12236

Author: Knagis

src/compiler/parser.ts

@@ -6360,7 +6360,8 @@ namespace ts {
                                 const whitespace = scanner.getTokenText();
                                 if (state === JSDocState.SavingComments) {
                                     comments.push(whitespace);
-                                } else if (margin !== undefined && indent + whitespace.length > margin) {
+                                }
+                                else if (margin !== undefined && indent + whitespace.length > margin) {
                                     comments.push(whitespace.slice(margin - indent - 1));
                                 }
                                 indent += whitespace.length;

tests/cases/fourslash/commentsLinePreservation.ts

@@ -105,6 +105,13 @@
 ////  * second time information about the param again
 ////  */
 ////function /*l*/l(param1: string) { /*9*/param1 = "hello"; }
+////     /** 
+////       * This is firstLine
+//// This is second Line
+//// @param param1 first Line text
+//// second line text
+//// */
+////function /*m*/m(param1: string) { /*10*/param1 = "hello"; }
 
 verify.quickInfos({
     a: ["var a: string", "This is firstLine\nThis is second Line\n\nThis is fourth Line"],
@@ -136,5 +143,8 @@ verify.quickInfos({
     8: ["(parameter) param1: string", "hello   "],
 
     l: ["function l(param1: string): void", "This is firstLine\nThis is second Line"],
-    9: ["(parameter) param1: string", "first Line text\nblank line that shouldnt be shown when starting this \nsecond time information about the param again"]
+    9: ["(parameter) param1: string", "first Line text\nblank line that shouldnt be shown when starting this \nsecond time information about the param again"],
+
+    m: ["function m(param1: string): void", "This is firstLine\nThis is second Line"],
+    10: ["(parameter) param1: string", "first Line text\nsecond line text"]
 });