Use Inline instead of NewLine fix

Author: bombsimon

pkg/golinters/whitespace.go

@@ -58,14 +58,13 @@ func NewWhitespace(settings *config.WhitespaceSettings) *goanalysis.Linter {
 					}
 
 				case whitespace.MessageTypeAdd:
-					position := pass.Fset.PositionFor(issue.Diagnostic, false)
-					bracketLine, err := lintCtx.LineCache.GetLine(position.Filename, position.Line)
-					if err != nil {
-						return nil, fmt.Errorf("failed to get line %s:%d: %w", position.Filename, position.Line, err)
-					}
-
+					report.Pos = pass.Fset.PositionFor(issue.FixStart, false)
 					report.Replacement = &result.Replacement{
-						NewLines: []string{bracketLine + "\n"},
+						Inline: &result.InlineFix{
+							StartCol:  0,
+							Length:    1,
+							NewString: "\n\t",
+						},
 					}
 
 				default:

test/testdata/fix/in/whitespace.go

@@ -59,4 +59,15 @@ func multiIfFunc() {
 		2 == 2 {
 		fmt.Println("Hello multi-line world")
 	}
+
+	if true {
+		if true {
+			if true {
+				if 1 == 1 &&
+					2 == 2 {
+						fmt.Println("Hello nested multi-line world")
+				}
+			}
+		}
+	}
 }

test/testdata/fix/out/whitespace.go

@@ -57,4 +57,16 @@ func multiIfFunc() {
 
 		fmt.Println("Hello multi-line world")
 	}
+
+	if true {
+		if true {
+			if true {
+				if 1 == 1 &&
+					2 == 2 {
+
+						fmt.Println("Hello nested multi-line world")
+				}
+			}
+		}
+	}
 }