Add missing scriptencoding

autoload/airline/async.vim

@@ -1,6 +1,8 @@
 " MIT License. Copyright (c) 2013-2017 C.Brabandt
 " vim: et ts=2 sts=2 sw=2
 
+scriptencoding utf-8
+
 let s:untracked_jobs = {}
 let s:mq_jobs        = {}
 let s:po_jobs        = {}

autoload/airline/extensions/ale.vim

@@ -1,6 +1,8 @@
 " MIT License. Copyright (c) 2013-2017 Bjorn Neergaard, w0rp
 " vim: et ts=2 sts=2 sw=2
 
+scriptencoding utf-8
+
 let s:error_symbol = get(g:, 'airline#extensions#ale#error_symbol', 'E:')
 let s:warning_symbol = get(g:, 'airline#extensions#ale#warning_symbol', 'W:')
 

autoload/airline/extensions/cursormode.vim

@@ -18,7 +18,9 @@
 " DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 " TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
 " OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-"
+
+scriptencoding utf-8
+
 let s:is_win = has('win32') || has('win64')
 let s:is_iTerm = exists('$TERM_PROGRAM') && $TERM_PROGRAM =~# 'iTerm.app'
 let s:is_AppleTerminal = exists('$TERM_PROGRAM') && $TERM_PROGRAM =~# 'Apple_Terminal'