Handling everything except for tabs

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

@@ -20,12 +20,6 @@ var someOneWantsThisMuchIndentation = """
           </element>
 """;
 
-var whatAboutWhiteSpace = """
-    Four Spaces
-
-    That last line is only two
-    """;
-
 var whatAboutWhiteSpace = """
     Four Spaces
 

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

@@ -0,0 +1,3 @@
+var someString = """
+    Indent based on previous line
+    """;

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

@@ -0,0 +1,3 @@
+var someString = """
+            Indent based on previous line
+            """;

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

@@ -0,0 +1,5 @@
+var whatAboutWhiteSpace = """
+    Four Spaces
+
+    That last line is only two
+    """;

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

@@ -0,0 +1,5 @@
+var whatAboutWhiteSpace = """
+    Four Spaces
+
+    That last line is only two
+    """;

Src/CSharpier/DocPrinter/DocPrinter.cs

@@ -295,7 +295,11 @@ private void ProcessLine(LineDoc line, PrintMode mode, Indent indent)
         {
             if (!this.SkipNextNewLine || !this.NewLineNextStringValue)
             {
-                this.Output.TrimTrailingWhitespace();
+                if (line is not HardLineNoTrim)
+                {
+                    this.Output.TrimTrailingWhitespace();
+                }
+
                 this.Output.Append(this.EndOfLine).Append(indent.Value);
                 this.CurrentWidth = indent.Length;
             }

Src/CSharpier/DocTypes/Doc.cs

@@ -23,6 +23,8 @@ public static implicit operator Doc(string value)
 
     public static readonly HardLine HardLine = new();
 
+    public static readonly HardLineNoTrim HardLineNoTrim = new();
+
     public static readonly HardLine HardLineSkipBreakIfFirstInGroup = new(false, true);
 
     public static readonly HardLine HardLineIfNoPreviousLine = new(true);

Src/CSharpier/DocTypes/HardLine.cs

@@ -10,4 +10,4 @@ public HardLine(bool squash = false, bool skipBreakIfFirstInGroup = false)
         this.Squash = squash;
         this.SkipBreakIfFirstInGroup = skipBreakIfFirstInGroup;
     }
-}
+}

Src/CSharpier/DocTypes/HardLineNoTrim.cs

@@ -0,0 +1,3 @@
+namespace CSharpier.DocTypes;
+
+internal class HardLineNoTrim : HardLine { }

Src/CSharpier/SyntaxPrinter/Token.cs

@@ -90,7 +90,9 @@ is InterpolatedStringExpressionSyntax
                             : string.Empty;
                     modifiedLine += line.TrimStart();
                     contents.Add(modifiedLine);
-                    contents.Add(Doc.HardLine);
+                    contents.Add(
+                        numberOfSpacesToAddOrRemove > 0 ? Doc.HardLineNoTrim : Doc.HardLine
+                    );
                 }
 
                 contents.RemoveAt(contents.Count - 1);