RewriteEngine on
RewriteBase /
+# serve vim commands when requesting /digraphs.ex as well
+RewriteRule ^(digraphs)\.ex(/.*)?$ $1.vim$2
+
# add .plp if a file exists with .plp appended (topdir only)
RewriteCond %{REQUEST_FILENAME}.plp -f
RewriteRule ^/*([^/]+)(.*) $1.plp$2