Fix row numbering

Co-authored-by: Lunny Xiao <[email protected]>

Author: HenriquerPimentel

modules/markup/csv/csv.go

@@ -97,7 +97,7 @@ func (r Renderer) Render(ctx *markup.RenderContext, input io.Reader, output io.W
 		return err
 	}
 
-	row := 1
+	row := 0
 	for {
 		fields, err := rd.Read()
 		if err == io.EOF || (row >= maxRows && maxRows != 0) {

modules/markup/csv/csv_test.go

@@ -16,10 +16,10 @@ import (
 func TestRenderCSV(t *testing.T) {
 	var render Renderer
 	kases := map[string]string{
-		"a":        "<table class=\"data-table\"><tr><th class=\"line-num\">1</th><th>a</th></tr></table>",
-		"1,2":      "<table class=\"data-table\"><tr><th class=\"line-num\">1</th><th>1</th><th>2</th></tr></table>",
-		"1;2\n3;4": "<table class=\"data-table\"><tr><th class=\"line-num\">1</th><th>1</th><th>2</th></tr><tr><td class=\"line-num\">2</td><td>3</td><td>4</td></tr></table>",
-		"<br/>":    "<table class=\"data-table\"><tr><th class=\"line-num\">1</th><th>&lt;br/&gt;</th></tr></table>",
+		"a":        "<table class=\"data-table\"><tr><th class=\"line-num\">0</th><th>a</th></tr></table>",
+		"1,2":      "<table class=\"data-table\"><tr><th class=\"line-num\">0</th><th>1</th><th>2</th></tr></table>",
+		"1;2\n3;4": "<table class=\"data-table\"><tr><th class=\"line-num\">0</th><th>1</th><th>2</th></tr><tr><td class=\"line-num\">2</td><td>3</td><td>4</td></tr></table>",
+		"<br/>":    "<table class=\"data-table\"><tr><th class=\"line-num\">0</th><th>&lt;br/&gt;</th></tr></table>",
 	}
 
 	for k, v := range kases {