fix(rule): correct punctuation regexp

Author: azu

src/max-ten.js

@@ -9,7 +9,7 @@ function countTen(text) {
  */
 export default function (context) {
     var maxLen = 3;
-    const punctuation = /。./;
+    const punctuation = /[。.]/;
     let helper = new RuleHelper(context);
     let {Syntax, RuleError, report, getSource} = context;
     var currentParagraphText = "";

test/fixtures/README.md

@@ -0,0 +1 @@
+テキスト、テキスト、テキスト、です。

test/fixtures/error.md

@@ -0,0 +1 @@
+テキスト、テキスト、テキスト。テキスト、テキスト、テキスト。

test/fixtures/pass.md

@@ -11,11 +11,17 @@ describe("max-ten", function () {
     afterEach(function () {
         textlint.resetRules();
     });
-    it("should lint wrong tech words", function () {
-        var filePath = path.join(__dirname, "/fixtures/README.md");
+    it("should report error", function () {
+        var filePath = path.join(__dirname, "/fixtures/error.md");
         var result = textlint.lintFile(filePath);
         assert(result.filePath === filePath);
         assert(result.messages.length > 0);
         assert.equal(result.messages[0].ruleId, "max-ten");
     });
+    it("should not report error", function () {
+        var filePath = path.join(__dirname, "/fixtures/pass.md");
+        var result = textlint.lintFile(filePath);
+        assert(result.filePath === filePath);
+        assert(result.messages.length === 0);
+    });
 });