Make copies for map(), filter(), and reverse()

I really should have remembered this.  Caused broken 'thesaurus'
entries, in this case.

1 files changed, 9 insertions, 5 deletions

diff --git a/vim/vimrc b/vim/vimrc
index d60d66fd..09a31c42 100644
--- a/vim/vimrc
+++ b/vim/vimrc
@@ -2,7 +2,7 @@
 "  Tom Ryder (tejr)’s Literate Vimrc
 " ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 "
-" Last updated: Mon, 04 May 2020 00:51:58 UTC
+" Last updated: Sat, 09 May 2020 04:48:24 UTC
 "
 " │ And I was lifted up in heart, and thought
 " │ Of all my late-shown prowess in the lists,
@@ -118,10 +118,12 @@ if xdg#['config']['home'] !=# ''
 endif
 if !empty(s:xdgconfigpaths)
   execute 'set runtimepath^='.option#Escape(join(map(
-        \ s:xdgconfigpaths, 'option#item#Escape(v:val)'
+        \ copy(s:xdgconfigpaths),
+        \ 'option#item#Escape(v:val)'
         \), ','))
   execute 'set runtimepath+='.option#Escape(join(map(
-        \ reverse(s:xdgconfigpaths), 'option#item#Escape(v:val."/after")'
+        \ reverse(copy(s:xdgconfigpaths)),
+        \ 'option#item#Escape(v:val.''/after'')'
         \), ','))
 endif
 unlet s:xdgconfigpaths
@@ -419,10 +421,12 @@ endif
 if !empty(s:refdirs)
   try
     execute 'set dictionary^='.option#Escape(join(map(
-          \ s:refdirs, 'option#item#Escape(v:val."/dictionary.txt")'
+          \ copy(s:refdirs),
+          \ 'option#item#Escape(v:val.''/dictionary.txt'')'
           \), ','))
     execute 'set thesaurus^='.option#Escape(join(map(
-          \ s:refdirs, 'option#item#Escape(v:val."/thesaurus.txt")'
+          \ copy(s:refdirs),
+          \ 'option#item#Escape(v:val.''/thesaurus.txt'')'
           \), ','))
   catch /^Vim\%((\a\+)\)\=:E474:/
   endtry