Add multi-line comments for Elm (#283)

Technically the minimum necessary syntax for block comments requires
only a single hyphen (`-}`, `{-`), but I have found that using a double
hyphen plays a bit more nicely with the elmcast/elm-vim auto-formatting.
Further, uncommenting when using the single dashes leaves an extra level
of indentation (again, when using elmcast/elm-vim).

.gitignore

@@ -1,2 +1,3 @@
 *~
 *.swp
+tags

README.md

@@ -0,0 +1,156 @@
+# NERD Commenter
+
+Comment functions so powerful—no comment necessary.
+
+## Installation
+
+### Via Plugin Manager (Recommended)
+
+#### [Vim-Plug](https://github.com/junegunn/vim-plug)
+
+1. Add `Plug 'scrooloose/nerdcommenter'` to your vimrc file.
+2. Reload your vimrc or restart
+3. Run `:PlugInstall`
+
+#### [Vundle](https://github.com/VundleVim/Vundle.vim) or similar
+
+1. Add `Plugin 'scrooloose/nerdcommenter'` to your vimrc file.
+2. Reload your vimrc or restart
+3. Run `:BundleInstall`
+
+#### [NeoBundle](https://github.com/Shougo/neobundle.vim)
+
+1. Add `NeoBundle 'scrooloose/nerdcommenter'` to your vimrc file.
+2. Reload your vimrc or restart
+3. Run `:NeoUpdate``
+
+#### [Pathogen](https://github.com/tpope/vim-pathogen)
+
+```sh
+cd ~/.vim/bundle
+git clone https://github.com/scrooloose/nerdcommenter.git
+```
+
+### Manual Installation
+
+#### Unix
+
+(For Neovim, change `~/.vim/` to `~/.config/nvim/`.)
+
+```sh
+curl -fLo ~/.vim/plugin/NERD_Commenter.vim --create-dirs \
+  https://raw.githubusercontent.com/scrooloose/nerdcommenter/master/plugin/NERD_commenter.vim
+curl -fLo ~/.vim/doc/NERD_Commenter.txt --create-dirs \
+  https://raw.githubusercontent.com/scrooloose/nerdcommenter/master/doc/NERD_commenter.txt
+```
+
+#### Windows (PowerShell)
+
+```powershell
+md ~\vimfiles\plugin
+md ~\vimfiles\doc
+$pluguri = 'https://raw.githubusercontent.com/scrooloose/nerdcommenter/master/plugin/NERD_commenter.vim'
+$docsuri = 'https://raw.githubusercontent.com/scrooloose/nerdcommenter/master/doc/NERD_commenter.txt'
+(New-Object Net.WebClient).DownloadFile($pluguri, $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath("~\vimfiles\plugin\NERD_commenter.vim"))
+(New-Object Net.WebClient).DownloadFile($docsuri, $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath("~\vimfiles\doc\NERD_commenter.txt"))
+```
+
+### Post Installation
+
+Make sure that you have filetype plugins enabled, as the plugin makes use of **|commentstring|** where possible (which is usually set in a filetype plugin). See **|filetype-plugin-on|** for details, but the short version is make sure this line appears in your vimrc:
+
+```sh
+filetype plugin on
+```
+
+## Usage
+
+### Documentation
+
+Please see the vim help system for full documentation of all options: `:help nerdcommenter`
+
+### Settings
+
+Several settings can be added to your vimrc to change the default behavior. Some examples:
+
+```vim
+" Add spaces after comment delimiters by default
+let g:NERDSpaceDelims = 1
+
+" Use compact syntax for prettified multi-line comments
+let g:NERDCompactSexyComs = 1
+
+" Align line-wise comment delimiters flush left instead of following code indentation
+let g:NERDDefaultAlign = 'left'
+
+" Set a language to use its alternate delimiters by default
+let g:NERDAltDelims_java = 1
+
+" Add your own custom formats or override the defaults
+let g:NERDCustomDelimiters = { 'c': { 'left': '/**','right': '*/' } }
+
+" Allow commenting and inverting empty lines (useful when commenting a region)
+let g:NERDCommentEmptyLines = 1
+
+" Enable trimming of trailing whitespace when uncommenting
+let g:NERDTrimTrailingWhitespace = 1
+```
+
+### Default mappings
+
+The following key mappings are provided by default (there is also a menu provided that contains menu items corresponding to all the below mappings):
+
+Most of the following mappings are for normal/visual mode only. The **|NERDComInsertComment|** mapping is for insert mode only.
+
+  * `[count]<leader>cc` **|NERDComComment|**
+
+    Comment out the current line or text selected in visual mode.
+
+  * `[count]<leader>cn` **|NERDComNestedComment|**
+
+    Same as <leader>cc but forces nesting.
+
+  * `[count]<leader>c<space>` **|NERDComToggleComment|**
+
+    Toggles the comment state of the selected line(s). If the topmost selected line is commented, all selected lines are uncommented and vice versa.
+
+  * `[count]<leader>cm` **|NERDComMinimalComment|**
+
+    Comments the given lines using only one set of multipart delimiters.
+
+  * `[count]<leader>ci` **|NERDComInvertComment|**
+
+    Toggles the comment state of the selected line(s) individually.
+
+  * `[count]<leader>cs` **|NERDComSexyComment|**
+
+    Comments out the selected lines with a pretty block formatted layout.
+
+  * `[count]<leader>cy` **|NERDComYankComment|**
+
+    Same as <leader>cc except that the commented line(s) are yanked first.
+
+  * `<leader>c$` **|NERDComEOLComment|**
+
+    Comments the current line from the cursor to the end of line.
+
+  * `<leader>cA` **|NERDComAppendComment|**
+
+    Adds comment delimiters to the end of line and goes into insert mode between them.
+
+  * **|NERDComInsertComment|**
+
+    Adds comment delimiters at the current cursor position and inserts between. Disabled by default.
+
+  * `<leader>ca` **|NERDComAltDelim|**
+
+    Switches to the alternative set of delimiters.
+
+  * `[count]<leader>cl`  
+    `[count]<leader>cb` **|NERDComAlignedComment|**
+
+    Same as **|NERDComComment|** except that the delimiters are aligned down the left side (`<leader>cl`) or both sides (`<leader>cb`).
+
+  * `[count]<leader>cu` **|NERDComUncommentLine|**
+
+    Uncomments the selected line(s).

Rakefile

@@ -1,18 +1,76 @@
-desc "Copy the vim/doc files into ~/.vim"
+# written by travis jeffery <travisjeffery@gmail.com>
-task :deploy_local do
+# contributions by scrooloose <github:scrooloose>
-  run "cp plugin/NERD_commenter.vim ~/.vim/plugin"
-  run "cp doc/NERD_commenter.txt ~/.vim/doc"
-end
 
+require 'rake'
+require 'find'
+require 'pathname'
 
-desc "Create a zip archive for release to vim.org"
+IGNORE = [/\.gitignore$/, /Rakefile$/]
+
+files = `git ls-files`.split("\n")
+files.reject! { |f| IGNORE.any? { |re| f.match(re) } }
+
+desc 'Zip up the project files'
 task :zip do
-  abort "NERD_commenter.zip already exists, aborting" if File.exist?("NERD_commenter.zip")
+  zip_name = File.basename(File.dirname(__FILE__))
-  run "zip NERD_commenter.zip plugin/NERD_commenter.vim doc/NERD_commenter.txt"
+  zip_name.gsub!(/ /, '_')
+  zip_name = "#{zip_name}.zip"
+
+  if File.exist?(zip_name)
+    abort("Zip file #{zip_name} already exists. Remove it first.")
+  end
+
+  puts "Creating zip file: #{zip_name}"
+  system("zip #{zip_name} #{files.join(" ")}")
 end
 
-def run(cmd)
+desc 'Install plugin and documentation'
-  puts "Executing: #{cmd}"
+task :install do
-  system cmd
+  vimfiles = if ENV['VIMFILES']
+               ENV['VIMFILES']
+             elsif RUBY_PLATFORM =~ /(win|w)32$/
+               File.expand_path("~/vimfiles")
+             else
+               File.expand_path("~/.vim")
+             end
+  files.each do |file|
+    target_file = File.join(vimfiles, file)
+    FileUtils.mkdir_p File.dirname(target_file)
+    FileUtils.cp file, target_file
+
+    puts "Installed #{file} to #{target_file}"
+  end
+
 end
 
+desc 'Pulls from origin'
+task :pull do
+  puts "Updating local repo..."
+  system("cd " << Dir.new(File.dirname(__FILE__)).path << " && git pull")
+end
+
+desc 'Calls pull task and then install task'
+task :update => ['pull', 'install'] do
+  puts "Update of vim script complete."
+end
+
+desc 'Uninstall plugin and documentation'
+task :uninstall do
+  vimfiles = if ENV['VIMFILES']
+               ENV['VIMFILES']
+             elsif RUBY_PLATFORM =~ /(win|w)32$/
+               File.expand_path("~/vimfiles")
+             else
+               File.expand_path("~/.vim")
+             end
+  files.each do |file|
+    target_file = File.join(vimfiles, file)
+    FileUtils.rm target_file
+
+    puts "Uninstalled #{target_file}"
+  end
+
+end
+
+task :default => ['update']
+