all: fix table width calculation

If we have three columns, the first and second column width are

  100/3 = 33.3333

but the last column should be 100 - (33.3333+33.3333) = 33.3334.

3 files changed, 23 insertions, 16 deletions

diff --git a/adoc_node_test.go b/adoc_node_test.go
index 95df8fd..59ef18d 100644
--- a/adoc_node_test.go
+++ b/adoc_node_test.go
@@ -162,7 +162,7 @@ func TestAdocNode_postConsumeTable(t *testing.T) {
 					classNameValignTop,
 				},
 			}, {
-				width: big.NewRat("33.3333"),
+				width: big.NewRat("33.3334"),
 				classes: []string{
 					classNameTableBlock,
 					classNameHalignLeft,
diff --git a/adoc_table.go b/adoc_table.go
index c063a5c..d7271cb 100644
--- a/adoc_table.go
+++ b/adoc_table.go
@@ -195,6 +195,7 @@ func (table *adocTable) parseOptions(opts []string) {
 func (table *adocTable) recalculateWidth() {
 	var (
 		totalWidth   = big.NewRat(0)
+		lastWidth    = big.NewRat(100)
 		hasAutowidth bool
 	)
 	for _, format := range table.formats {
@@ -205,9 +206,15 @@ func (table *adocTable) recalculateWidth() {
 			totalWidth.Add(format.width)
 		}
 	}
-	for _, format := range table.formats {
-		if !hasAutowidth {
+	for x, format := range table.formats {
+		if hasAutowidth {
+			continue
+		}
+		if x == len(table.formats)-1 {
+			format.width = lastWidth
+		} else {
 			format.width = big.QuoRat(format.width, totalWidth).Mul(100)
+			lastWidth.Sub(format.width)
 		}
 	}
 }
diff --git a/testdata/got.test.html b/testdata/got.test.html
index dbd4b3f..2ec79f4 100644
--- a/testdata/got.test.html
+++ b/testdata/got.test.html
@@ -1390,7 +1390,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <tbody>
 <tr>
@@ -1481,7 +1481,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <tbody>
 <tr>
@@ -1508,7 +1508,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <tbody>
 <tr>
@@ -1682,7 +1682,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <thead>
 <tr>
@@ -1703,7 +1703,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <thead>
 <tr>
@@ -1724,7 +1724,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <thead>
 <tr>
@@ -1748,7 +1748,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <thead>
 <tr>
@@ -1769,7 +1769,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <thead>
 <tr>
@@ -1790,7 +1790,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <thead>
 <tr>
@@ -1815,7 +1815,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <thead>
 <tr>
@@ -1841,7 +1841,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <thead>
 <tr>
@@ -1867,7 +1867,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <thead>
 <tr>
@@ -1893,7 +1893,7 @@ D</p></td>
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
-<col style="width: 33.3333%;">
+<col style="width: 33.3334%;">
 </colgroup>
 <thead>
 <tr>