Ban use of ==# or ==? in the codebase, and prefer is# or is? instead

autoload/ale/cursor.vim

@@ -4,7 +4,7 @@
 " Return a formatted message according to g:ale_echo_msg_format variable
 function! s:GetMessage(linter, type, text) abort
     let l:msg = g:ale_echo_msg_format
-    let l:type = a:type ==# 'E'
+    let l:type = a:type is# 'E'
     \   ? g:ale_echo_msg_error_str
     \   : g:ale_echo_msg_warning_str
 
@@ -22,12 +22,12 @@ function! s:EchoWithShortMess(setting, message) abort
 
     try
         " Turn shortmess on or off.
-        if a:setting ==# 'on'
+        if a:setting is# 'on'
             setlocal shortmess+=T
             " echomsg is needed for the message to get truncated and appear in
             " the message history.
             exec "norm! :echomsg a:message\n"
-        elseif a:setting ==# 'off'
+        elseif a:setting is# 'off'
             setlocal shortmess-=T
             " Regular echo is needed for printing newline characters.
             echo a:message