all: realign all structs

Minimize struct allocation,

* columnFormat: from 40 to 16 bytes (-24 bytes)
* document: from 400 to 392 bytes (-8 bytes)
* element: from 312 to 264 bytes (-48 bytes)
* elementAttribute: from 80 to 72 bytes (-8 bytes)
* elementInclude: from 128 to 120 bytes (-8 bytes)
* elementTable: from 88 to 64 bytes (-24 bytes)
* inlineParser: from 64 to 40 bytes (-24 bytes)

Plus all structs in the test files.

16 files changed, 93 insertions, 74 deletions

diff --git a/cell_format_test.go b/cell_format_test.go
index ca5337f..58ef097 100644
--- a/cell_format_test.go
+++ b/cell_format_test.go
@@ -11,8 +11,8 @@ import (
 
 func TestParseCellFormat(t *testing.T) {
 	cases := []struct {
-		raw string
 		exp *cellFormat
+		raw string
 	}{{
 		raw: "3*",
 		exp: &cellFormat{
diff --git a/column_format.go b/column_format.go
index 2f667f7..aca4849 100644
--- a/column_format.go
+++ b/column_format.go
@@ -38,14 +38,17 @@ var _colStyles = map[byte]int{
 }
 
 type columnFormat struct {
+	width *big.Rat
+
+	classes []string
+
 	alignHor int
 	alignVer int
 	style    int
-	width    *big.Rat
-	classes  []string
 
 	// isDefault will true if its contains '*'.
 	isDefault bool
+
 	// isAutowidth will true if its contains '~'.
 	isAutowidth bool
 }
diff --git a/column_format_test.go b/column_format_test.go
index e091fd9..dff9280 100644
--- a/column_format_test.go
+++ b/column_format_test.go
@@ -12,9 +12,9 @@ import (
 
 func TestParseColumnFormat(t *testing.T) {
 	cases := []struct {
+		expFormat *columnFormat
 		s         string
 		expNCols  int
-		expFormat *columnFormat
 	}{{
 		s:        "3*",
 		expNCols: 3,
diff --git a/document.go b/document.go
index b3ab500..cdab21e 100644
--- a/document.go
+++ b/document.go
@@ -24,42 +24,45 @@ const (
 
 // Document represent content of asciidoc that has been parsed.
 type Document struct {
-	Title       DocumentTitle
-	Authors     []*Author
-	Revision    Revision
-	LastUpdated string
-	Attributes  AttributeEntry
-	TOCLevel    int
+	// anchors contains mapping between unique ID and its label.
+	anchors map[string]*anchor
 
-	rawAuthors   string
-	rawRevision  string
-	tocClasses   attributeClass
-	tocPosition  string
-	tocTitle     string
-	tocIsEnabled bool
+	content *element
+	header  *element
 
-	file    string
-	fpath   string
-	classes attributeClass
+	Attributes AttributeEntry
+	sectnums   *sectionCounters
 
-	// anchors contains mapping between unique ID and its label.
-	anchors map[string]*anchor
 	// titleID is the reverse of anchors, it contains mapping of title and
 	// its ID.
 	titleID map[string]string
 
-	sectnums  *sectionCounters
-	sectLevel int
+	Revision Revision
 
-	header  *element
-	content *element
+	LastUpdated string
+	file        string
+	fpath       string
+	rawAuthors  string
+	rawRevision string
+	tocPosition string
+	tocTitle    string
+
+	Title DocumentTitle
 
+	classes    attributeClass
+	tocClasses attributeClass
+
+	Authors []*Author
+
+	TOCLevel       int
+	sectLevel      int
 	counterExample int
 	counterImage   int
 	counterTable   int
 
-	isEmbedded bool
-	isForToC   bool
+	isEmbedded   bool
+	isForToC     bool
+	tocIsEnabled bool
 }
 
 func newDocument() *Document {
diff --git a/document_parser_test.go b/document_parser_test.go
index 30d6794..9cf2623 100644
--- a/document_parser_test.go
+++ b/document_parser_test.go
@@ -100,8 +100,8 @@ func TestParse_metaShowTitle(t *testing.T) {
 func TestParse_document_title(t *testing.T) {
 	cases := []struct {
 		content   string
-		exp       DocumentTitle
 		expString string
+		exp       DocumentTitle
 	}{{
 		content: `= Main: sub`,
 		exp: DocumentTitle{
diff --git a/document_title.go b/document_title.go
index d4ce06a..e646a8a 100644
--- a/document_title.go
+++ b/document_title.go
@@ -6,11 +6,13 @@ package asciidoctor
 import "fmt"
 
 type DocumentTitle struct {
+	el *element
+
 	Main string
 	Sub  string
-	el   *element
 	raw  string
-	sep  byte
+
+	sep byte
 }
 
 // String return the combination of main and subtitle separated by colon or
diff --git a/element.go b/element.go
index fc92c25..7f72000 100644
--- a/element.go
+++ b/element.go
@@ -15,33 +15,36 @@ import (
 
 // element is the building block of asciidoc document.
 type element struct {
-	elementAttribute
-
-	Text     string // The content of element without inline formatting.
-	kind     int
-	level    int    // The number of dot for ordered list, or '*' for unordered list.
-	raw      []byte // unparsed content of element.
-	rawLabel bytes.Buffer
-	rawTitle string
-
-	// The key and value for attribute (lineKindAttribute).
-	key   string
-	value string
-
 	// title is the parsed rawTitle for section L1 or parsed raw for
 	// section L2-L5.
 	title *element
-	label *element
+
+	prev   *element
+	next   *element
+	parent *element
+	child  *element
+	label  *element
+
+	table *elementTable
 
 	// sectnums contain the current section numbers.
 	// It will be set only if attribute "sectnums" is on.
 	sectnums *sectionCounters
 
-	table  *elementTable
-	parent *element
-	child  *element
-	next   *element
-	prev   *element
+	// The key and value for attribute (lineKindAttribute).
+	key   string
+	value string
+
+	rawTitle string
+	Text     string // The content of element without inline formatting.
+
+	raw []byte // Unparsed content of element.
+
+	elementAttribute
+
+	rawLabel bytes.Buffer
+	level    int // The number of dot for ordered list, or '*' for unordered list.
+	kind     int
 }
 
 func (el *element) getListOrderedClass() string {
diff --git a/element_attribute.go b/element_attribute.go
index ec24b9d..6f2f5af 100644
--- a/element_attribute.go
+++ b/element_attribute.go
@@ -11,13 +11,16 @@ import (
 )
 
 type elementAttribute struct {
+	Attrs map[string]string
+
 	ID       string
-	Attrs    map[string]string
-	style    int64
 	rawStyle string
-	roles    []string
-	options  []string
-	pos      int
+
+	roles   []string
+	options []string
+
+	style int64
+	pos   int
 }
 
 func (ea *elementAttribute) addRole(role string) {
diff --git a/element_include.go b/element_include.go
index 3a6a689..711ae29 100644
--- a/element_include.go
+++ b/element_include.go
@@ -12,8 +12,8 @@ import (
 
 type elementInclude struct {
 	fpath   string
-	attrs   elementAttribute
 	content []byte
+	attrs   elementAttribute
 }
 
 func parseInclude(doc *Document, line []byte) (el *elementInclude) {
diff --git a/element_table.go b/element_table.go
index 1378f02..fcd7af5 100644
--- a/element_table.go
+++ b/element_table.go
@@ -13,11 +13,14 @@ import (
 )
 
 type elementTable struct {
-	ncols     int
-	rows      []*tableRow
-	formats   []*columnFormat
-	classes   attributeClass
-	styles    map[string]string
+	styles map[string]string
+
+	rows    []*tableRow
+	formats []*columnFormat
+
+	classes attributeClass
+	ncols   int
+
 	hasHeader bool
 	hasFooter bool
 }
diff --git a/element_table_test.go b/element_table_test.go
index 3680358..5a9907e 100644
--- a/element_table_test.go
+++ b/element_table_test.go
@@ -13,8 +13,8 @@ import (
 func TestParseAttrCols(t *testing.T) {
 	cases := []struct {
 		val     string
-		ncols   int
 		formats []*columnFormat
+		ncols   int
 	}{{
 		val:   "3*",
 		ncols: 3,
diff --git a/element_test.go b/element_test.go
index f6bea81..9fe0c01 100644
--- a/element_test.go
+++ b/element_test.go
@@ -13,9 +13,9 @@ import (
 func TestAdocNode_parseListDescriptionItem(t *testing.T) {
 	cases := []struct {
 		line       string
-		expLevel   int
 		expRawTerm string
 		expRaw     string
+		expLevel   int
 	}{{
 		line:       "CPU::",
 		expLevel:   0,
diff --git a/inline_parser.go b/inline_parser.go
index 6a4b5eb..7d79ef3 100644
--- a/inline_parser.go
+++ b/inline_parser.go
@@ -14,14 +14,18 @@ import (
 type inlineParser struct {
 	container *element
 	current   *element
-	content   []byte
-	doc       *Document
-	x         int
-	state     *inlineParserState
-	prev      byte
-	c         byte
-	nextc     byte
-	nextcc    byte
+
+	doc   *Document
+	state *inlineParserState
+
+	content []byte
+
+	x      int
+	prev   byte
+	c      byte
+	nextc  byte
+	nextcc byte
+
 	isEscaped bool
 }
 
diff --git a/parser_paragraph_test.go b/parser_paragraph_test.go
index 8ca96ac..f87ae3b 100644
--- a/parser_paragraph_test.go
+++ b/parser_paragraph_test.go
@@ -13,8 +13,8 @@ import (
 func TestParser_parseParagraph(t *testing.T) {
 	cases := []struct {
 		desc    string
-		content []byte
 		exp     string
+		content []byte
 	}{{
 		desc: "with lead style",
 		content: []byte(`[.lead]
diff --git a/section_counters_test.go b/section_counters_test.go
index b6b5958..5020083 100644
--- a/section_counters_test.go
+++ b/section_counters_test.go
@@ -13,9 +13,9 @@ func TestSectionCounters(t *testing.T) {
 	sec := &sectionCounters{}
 
 	cases := []struct {
-		level     int
 		exp       *sectionCounters
 		expString string
+		level     int
 	}{{
 		level: 2,
 		exp: &sectionCounters{
diff --git a/testdata/got.test.html b/testdata/got.test.html
index 3c3e599..704ee70 100644
--- a/testdata/got.test.html
+++ b/testdata/got.test.html
@@ -2332,9 +2332,7 @@ D</p></td>
 
 package asciidoctor
 
-//
 // anchor contains label and counter for duplicate ID.
-//
 type anchor struct {
 	label   string
 	counter int