Use a new window for the ALEFixSuggest command, and document it better

syntax/ale-fix-suggest.vim

@@ -0,0 +1,13 @@
+if exists('b:current_syntax')
+    finish
+endif
+
+syn match aleFixerComment /^.*$/
+syn match aleFixerName /^'[^']*'/
+syn match aleFixerHelp /^See :help ale-fix-configuration/
+
+hi def link aleFixerComment Comment
+hi def link aleFixerName String
+hi def link aleFixerHelp Statement
+
+let b:current_syntax = 'ale-fix-suggest'