Fix missing word in fish completion script

contrib/completions.fish

@@ -18,7 +18,7 @@ complete -c exa -l 'colour-scale' -d "Highlight levels of file sizes dist
 # Filtering and sorting options
 complete -c exa -l 'group-directories-first' -d "Sort directories before other files"
 complete -c exa -l 'git-ignore' -d "Ignore files mentioned in '.gitignore'"
-complete -c exa -s 'a' -l 'all' -d "Show and 'dot' files"
+complete -c exa -s 'a' -l 'all' -d "Show hidden and 'dot' files"
 complete -c exa -s 'd' -l 'list-dirs' -d "List directories like regular files"
 complete -c exa -s 'L' -l 'level' -d "Limit the depth of recursion" -a "1 2 3 4 5 6 7 8 9"
 complete -c exa -s 'r' -l 'reverse' -d "Reverse the sort order"