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

autoload/ale/handlers/cppcheck.vim

@@ -11,7 +11,7 @@ function! ale#handlers#cppcheck#HandleCppCheckFormat(buffer, lines) abort
         if ale#path#IsBufferPath(a:buffer, l:match[1])
             call add(l:output, {
             \   'lnum': str2nr(l:match[2]),
-            \   'type': l:match[3] ==# 'error' ? 'E' : 'W',
+            \   'type': l:match[3] is# 'error' ? 'E' : 'W',
             \   'text': l:match[4],
             \})
         endif

autoload/ale/handlers/css.vim

@@ -29,7 +29,7 @@ function! ale#handlers#css#HandleCSSLintFormat(buffer, lines) abort
         \   'lnum': l:match[1] + 0,
         \   'col': l:match[2] + 0,
         \   'text': l:text,
-        \   'type': l:type ==# 'Warning' ? 'W' : 'E',
+        \   'type': l:type is# 'Warning' ? 'W' : 'E',
         \})
     endfor
 
@@ -61,7 +61,7 @@ function! ale#handlers#css#HandleStyleLintFormat(buffer, lines) abort
         call add(l:output, {
         \   'lnum': l:match[1] + 0,
         \   'col': l:match[2] + 0,
-        \   'type': l:match[3] ==# '✖' ? 'E' : 'W',
+        \   'type': l:match[3] is# '✖' ? 'E' : 'W',
         \   'text': l:match[4] . ' [' . l:match[5] . ']',
         \})
     endfor

autoload/ale/handlers/eslint.vim

@@ -92,7 +92,7 @@ function! ale#handlers#eslint#Handle(buffer, lines) abort
         \   'lnum': l:match[1] + 0,
         \   'col': l:match[2] + 0,
         \   'text': l:text,
-        \   'type': l:type ==# 'Warning' ? 'W' : 'E',
+        \   'type': l:type is# 'Warning' ? 'W' : 'E',
         \}
 
         for l:col_match in ale#util#GetMatches(l:text, s:col_end_patterns)

autoload/ale/handlers/gcc.vim

@@ -81,7 +81,7 @@ function! ale#handlers#gcc#HandleGCCFormat(buffer, lines) abort
                 let l:included_filename = ''
             endif
         elseif l:include_lnum > 0
-        \&& (empty(l:included_filename) || l:included_filename ==# l:match[1])
+        \&& (empty(l:included_filename) || l:included_filename is# l:match[1])
             " If we hit the first error after an include header, or the
             " errors below have the same name as the first filename we see,
             " then include these lines, and remember what that filename was.
@@ -96,7 +96,7 @@ function! ale#handlers#gcc#HandleGCCFormat(buffer, lines) abort
             let l:included_filename = ''
 
             if s:IsHeaderFile(bufname(bufnr('')))
-            \&& l:match[5][:len(s:pragma_error) - 1] ==# s:pragma_error
+            \&& l:match[5][:len(s:pragma_error) - 1] is# s:pragma_error
                 continue
             endif
 

autoload/ale/handlers/haskell.vim

@@ -14,7 +14,7 @@ function! ale#handlers#haskell#HandleGHCFormat(buffer, lines) abort
     for l:line in a:lines
         if len(matchlist(l:line, l:pattern)) > 0
             call add(l:corrected_lines, l:line)
-        elseif l:line ==# ''
+        elseif l:line is# ''
             call add(l:corrected_lines, l:line)
         else
             if len(l:corrected_lines) > 0
@@ -42,10 +42,10 @@ function! ale#handlers#haskell#HandleGHCFormat(buffer, lines) abort
           let l:text = l:errors[2]
         else
           let l:ghc_type = ''
-          let l:text = l:match[4][:0] ==# ' ' ? l:match[4][1:] : l:match[4]
+          let l:text = l:match[4][:0] is# ' ' ? l:match[4][1:] : l:match[4]
         endif
 
-        if l:ghc_type ==? 'Warning'
+        if l:ghc_type is? 'Warning'
             let l:type = 'W'
         else
             let l:type = 'E'

autoload/ale/handlers/rust.vim

@@ -47,7 +47,7 @@ function! ale#handlers#rust#HandleRustErrorsForFile(buffer, full_filename, lines
         for l:span in l:error.spans
             if (
             \   l:span.is_primary
-            \   && (ale#path#IsBufferPath(a:buffer, l:span.file_name) || l:span.file_name ==# '<anon>')
+            \   && (ale#path#IsBufferPath(a:buffer, l:span.file_name) || l:span.file_name is# '<anon>')
             \)
                 call add(l:output, {
                 \   'lnum': l:span.line_start,