indent for ruby, yaml; other updates

autoload/plug.vim

@@ -97,7 +97,7 @@ let s:plug_tab = get(s:, 'plug_tab', -1)
 let s:plug_buf = get(s:, 'plug_buf', -1)
 let s:mac_gui = has('gui_macvim') && has('gui_running')
 let s:is_win = has('win32') || has('win64')
-let s:nvim = has('nvim') && exists('*jobwait') && !s:is_win
+let s:nvim = has('nvim-0.2') || (has('nvim') && exists('*jobwait') && !s:is_win)
 let s:vim8 = has('patch-8.0.0039') && exists('*job_start')
 let s:me = resolve(expand('<sfile>:p'))
 let s:base_spec = { 'branch': 'master', 'frozen': 0 }
@@ -442,16 +442,21 @@ function! plug#load(...)
   if !exists('g:plugs')
     return s:err('plug#begin was not called')
   endif
-  let unknowns = filter(copy(a:000), '!has_key(g:plugs, v:val)')
+  let names = a:0 == 1 && type(a:1) == s:TYPE.list ? a:1 : a:000
+  let unknowns = filter(copy(names), '!has_key(g:plugs, v:val)')
   if !empty(unknowns)
     let s = len(unknowns) > 1 ? 's' : ''
     return s:err(printf('Unknown plugin%s: %s', s, join(unknowns, ', ')))
   end
-  for name in a:000
-    call s:lod([name], ['ftdetect', 'after/ftdetect', 'plugin', 'after/plugin'])
-  endfor
-  call s:dobufread(a:000)
-  return 1
+  let unloaded = filter(copy(names), '!get(s:loaded, v:val, 0)')
+  if !empty(unloaded)
+    for name in unloaded
+      call s:lod([name], ['ftdetect', 'after/ftdetect', 'plugin', 'after/plugin'])
+    endfor
+    call s:dobufread(unloaded)
+    return 1
+  end
+  return 0
 endfunction
 
 function! s:remove_triggers(name)
@@ -575,7 +580,7 @@ function! s:infer_properties(name, repo)
       let uri = repo
     else
       if repo !~ '/'
-        let repo = 'vim-scripts/'. repo
+        throw printf('Invalid argument: %s (implicit `vim-scripts'' expansion is deprecated)', repo)
       endif
       let fmt = get(g:, 'plug_url_format', 'https://git::@github.com/%s.git')
       let uri = printf(fmt, repo)
@@ -1063,7 +1068,7 @@ function! s:update_finish()
       elseif has_key(spec, 'tag')
         let tag = spec.tag
         if tag =~ '\*'
-          let tags = s:lines(s:system('git tag --list '.string(tag).' --sort -version:refname 2>&1', spec.dir))
+          let tags = s:lines(s:system('git tag --list '.s:shellesc(tag).' --sort -version:refname 2>&1', spec.dir))
           if !v:shell_error && !empty(tags)
             let tag = tags[0]
             call s:log4(name, printf('Latest tag for %s -> %s', spec.tag, tag))
@@ -2022,7 +2027,7 @@ function! s:git_validate(spec, check_branch)
       " Check tag
       if has_key(a:spec, 'tag')
         let tag = s:system_chomp('git describe --exact-match --tags HEAD 2>&1', a:spec.dir)
-        if a:spec.tag !=# tag
+        if a:spec.tag !=# tag && a:spec.tag !~ '\*'
           let err = printf('Invalid tag: %s (expected: %s). Try PlugUpdate.',
                 \ (empty(tag) ? 'N/A' : tag), a:spec.tag)
         endif

ftplugin/ruby.vim

-set shiftwidth=2 softtabstop=2 tabstop=2
-set expandtab
+setlocal shiftwidth=2 softtabstop=2 tabstop=2
+setlocal expandtab

ftplugin/yaml.vim

+setlocal shiftwidth=2 softtabstop=2 tabstop=2
+setlocal expandtab

vimrc

@@ -14,7 +14,7 @@ filetype on
 filetype plugin on
 filetype plugin indent on
 syntax enable
-set grepprg=grep\ -nH
+set grepprg=grep\ -nRH
 
 " Spaces are better than a tab character
 " set expandtab
@@ -135,6 +135,7 @@ Plug 'gabrielelana/vim-markdown', {'for': 'markdown'}
 Plug 'majutsushi/tagbar', {'for': ['cpp', 'c', 'go', 'sh', 'javascript']}
 Plug 'godlygeek/tabular'
 Plug 'dhruvasagar/vim-table-mode'
+Plug 'tpope/vim-liquid', {'for': ['html', 'markdown']}
 
 if executable('cmake')
 	" YCM command lifted from vim-plug readme