condensing new lines after a comment down to a single line (#1446)

closes #1443

Src/CSharpier.Tests/FormattingTests/TestFiles/cs/CSharpierIgnore_TopLevel.expected.test

@@ -13,7 +13,6 @@ string formatMe;
 string keepNewLine;
 // csharpier-ignore-end
 
-
 // csharpier-ignore-start
 string removeNewLine;
 // csharpier-ignore-end

Src/CSharpier.Tests/FormattingTests/TestFiles/cs/Comments_TrailingNewLines.expected.test

@@ -0,0 +1,5 @@
+var x = 1;
+
+// condense down to just a single extra line
+
+var y = 2;

Src/CSharpier.Tests/FormattingTests/TestFiles/cs/Comments_TrailingNewLines.test

@@ -0,0 +1,8 @@
+var x = 1;
+
+// condense down to just a single extra line
+
+
+
+
+var y = 2;

Src/CSharpier/SyntaxPrinter/Token.cs

@@ -237,6 +237,10 @@ private static Doc PrivatePrintLeadingTrivia(
 
             if (printNewLines && kind == SyntaxKind.EndOfLineTrivia)
             {
+                if (docs.Count > 0 && docs[^1] == Doc.HardLineSkipBreakIfFirstInGroup)
+                {
+                    printNewLines = false;
+                }
                 docs.Add(Doc.HardLineSkipBreakIfFirstInGroup);
             }
             if (kind is not (SyntaxKind.EndOfLineTrivia or SyntaxKind.WhitespaceTrivia))
@@ -317,7 +321,7 @@ void AddLeadingComment(CommentType commentType)
             }
         }
 
-        while (skipLastHardline && docs.Any() && docs.Last() is HardLine or NullDoc)
+        while (skipLastHardline && docs.Count != 0 && docs.Last() is HardLine or NullDoc)
         {
             docs.RemoveAt(docs.Count - 1);
         }