(refs #664)Normalize line separator and empty line

src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala

@@ -6,6 +6,7 @@ import gitbucket.core.helper
 import gitbucket.core.service._
 import gitbucket.core.util._
 import gitbucket.core.util.JGitUtil._
+import gitbucket.core.util.StringUtil._
 import gitbucket.core.util.ControlUtil._
 import gitbucket.core.util.Implicits._
 import gitbucket.core.util.Directory._
@@ -236,9 +237,16 @@ trait RepositoryViewerControllerBase extends ControllerBase {
   })
 
   post("/:owner/:repository/create", editorForm)(collaboratorsOnly { (form, repository) =>
-    commitFile(repository, form.branch, form.path, Some(form.newFileName), None,
-      StringUtil.convertLineSeparator(form.content, form.lineSeparator), form.charset,
-      form.message.getOrElse(s"Create ${form.newFileName}"))
+    commitFile(
+      repository  = repository,
+      branch      = form.branch,
+      path        = form.path,
+      newFileName = Some(form.newFileName),
+      oldFileName = None,
+      content     = appendNewLine(convertLineSeparator(form.content, form.lineSeparator), form.lineSeparator),
+      charset     = form.charset,
+      message     = form.message.getOrElse(s"Create ${form.newFileName}")
+    )
 
     redirect(s"/${repository.owner}/${repository.name}/blob/${form.branch}/${
       if(form.path.length == 0) form.newFileName else s"${form.path}/${form.newFileName}"
@@ -246,13 +254,20 @@ trait RepositoryViewerControllerBase extends ControllerBase {
   })
 
   post("/:owner/:repository/update", editorForm)(collaboratorsOnly { (form, repository) =>
-    commitFile(repository, form.branch, form.path, Some(form.newFileName), form.oldFileName,
-      StringUtil.convertLineSeparator(form.content, form.lineSeparator), form.charset,
-      if(form.oldFileName.exists(_ == form.newFileName)){
+    commitFile(
+      repository  = repository,
+      branch      = form.branch,
+      path        = form.path,
+      newFileName = Some(form.newFileName),
+      oldFileName = form.oldFileName,
+      content     = appendNewLine(convertLineSeparator(form.content, form.lineSeparator), form.lineSeparator),
+      charset     = form.charset,
+      message     = if(form.oldFileName.exists(_ == form.newFileName)){
         form.message.getOrElse(s"Update ${form.newFileName}")
       } else {
         form.message.getOrElse(s"Rename ${form.oldFileName.get} to ${form.newFileName}")
-      })
+      }
+    )
 
     redirect(s"/${repository.owner}/${repository.name}/blob/${form.branch}/${
       if(form.path.length == 0) form.newFileName else s"${form.path}/${form.newFileName}"

src/main/scala/gitbucket/core/controller/WikiController.scala

@@ -3,6 +3,7 @@ package gitbucket.core.controller
 import gitbucket.core.wiki.html
 import gitbucket.core.service.{RepositoryService, WikiService, ActivityService, AccountService}
 import gitbucket.core.util._
+import gitbucket.core.util.StringUtil._
 import gitbucket.core.util.ControlUtil._
 import gitbucket.core.util.Implicits._
 import gitbucket.core.util.Directory._
@@ -110,8 +111,16 @@ trait WikiControllerBase extends ControllerBase {
   
   post("/:owner/:repository/wiki/_edit", editForm)(collaboratorsOnly { (form, repository) =>
     defining(context.loginAccount.get){ loginAccount =>
-      saveWikiPage(repository.owner, repository.name, form.currentPageName, form.pageName,
-          form.content, loginAccount, form.message.getOrElse(""), Some(form.id)).map { commitId =>
+      saveWikiPage(
+        repository.owner,
+        repository.name,
+        form.currentPageName,
+        form.pageName,
+        appendNewLine(convertLineSeparator(form.content, "LF"), "LF"),
+        loginAccount,
+        form.message.getOrElse(""),
+        Some(form.id)
+      ).map { commitId =>
         updateLastActivityDate(repository.owner, repository.name)
         recordEditWikiPageActivity(repository.owner, repository.name, loginAccount.userName, form.pageName, commitId)
       }

src/main/scala/gitbucket/core/service/WikiService.scala

@@ -202,7 +202,7 @@ trait WikiService {
   }
 
   /**
-   * Save the wiki page.
+   * Save the wiki page and return the commit id.
    */
   def saveWikiPage(owner: String, repository: String, currentPageName: String, newPageName: String,
       content: String, committer: Account, message: String, currentId: Option[String]): Option[String] = {

src/main/scala/gitbucket/core/util/StringUtil.scala

@@ -62,6 +62,21 @@ object StringUtil {
     }
   }
 
+  /**
+   * Appends LF if the given string does not end with LF.
+   *
+   * @param content the content
+   * @param lineSeparator "LF" or "CRLF"
+   * @return the converted content
+   */
+  def appendNewLine(content: String, lineSeparator: String): String = {
+    if(lineSeparator == "CRLF") {
+      if (content.endsWith("\r\n")) content else content + "\r\n"
+    } else {
+      if (content.endsWith("\n")) content else content + "\n"
+    }
+  }
+
   /**
    * Extract issue id like ```#issueId``` from the given message.
    *