fixing issue when formatting with tabs that would convert tabs in com… (

belav#1344)

…ments into spaces.

closes belav#1343

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

@@ -0,0 +1,29 @@
+public class Foo
+{
+	/**
+	 * comment
+	 */
+	public class Bar
+	{
+		/**
+		 * comment
+		 */
+		var x = 0;
+	}
+
+	public void SomeFunction()
+	{
+		/*
+		The following line is an example with an indent:
+			This line is indented by one tab.
+		*/
+		/*
+		The following line is an example with an indent:
+			This line is indented by 4 spaces but will be converted to 1 tab
+		*/
+		/*
+		The following line is an example with an indent:
+		   This line is indented by 3 spaces but will be left as 3 spaces
+		*/
+	}
+}

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

@@ -10,4 +10,20 @@ public class Foo
 		 */
 		var x = 0;
 	}
+
+	public void SomeFunction()
+	{
+		/*
+		The following line is an example with an indent:
+			This line is indented by one tab.
+		*/
+		/*
+		The following line is an example with an indent:
+		    This line is indented by 4 spaces but will be converted to 1 tab
+		*/
+		/*
+		The following line is an example with an indent:
+		   This line is indented by 3 spaces but will be left as 3 spaces
+		*/
+	}
 }

Src/CSharpier/DocPrinter/DocPrinter.cs

@@ -221,6 +221,12 @@ int CalculateIndentLength(string line) =>
                         this.Output.Append(indent.Value);
                         spacesToAppend -= indentLength;
                     }
+
+                    while (spacesToAppend > 0 && spacesToAppend >= this.PrinterOptions.IndentSize)
+                    {
+                        this.Output.Append('\t');
+                        spacesToAppend -= this.PrinterOptions.IndentSize;
+                    }
                 }
                 if (spacesToAppend > 0)
                 {