change show test utility function

Due to how various tests show the status of variables I decided to
modify the `show` test utility function I recently added.

tests/argparse.in

@@ -59,28 +59,24 @@ echo '# One arg and no matching flags'
 begin
     argparse h/help -- help
     set -l
-    show $argv
 end
 
 echo '# Five args with two matching a flag'
 begin
     argparse h/help -- help --help me -h 'a lot more'
     set -l
-    show $argv
 end
 
 echo '# Required, optional, and multiple flags'
 begin
     argparse 'h/help' 'a/abc=' 'd/def=?' 'g/ghk=+' -- help --help me --ghk=g1 --abc=ABC --ghk g2 --d -g g3
     set -l
-    show $argv
 end
 
 echo '# --stop-nonopt works'
 begin
     argparse --stop-nonopt 'h/help' 'a/abc=' -- -a A1 -h --abc A2 non-opt 'second non-opt' --help
     set -l
-    show $argv
 end
 
 echo '# Implicit int flags work'

tests/argparse.out

@@ -1,16 +1,10 @@
 # No args
 # One arg and no matching flags
 argv help
-count=1
-|help|
 # Five args with two matching a flag
 _flag_h 2
 _flag_help 2
 argv 'help'  'me'  'a lot more'
-count=3
-|help|
-|me|
-|a lot more|
 # Required, optional, and multiple flags
 _flag_a ABC
 _flag_abc ABC
@@ -21,19 +15,12 @@ _flag_ghk 'g1'  'g2'  'g3'
 _flag_h 1
 _flag_help 1
 argv 'help'  'me'
-count=2
-|help|
-|me|
 # --stop-nonopt works
 _flag_a A2
 _flag_abc A2
 _flag_h 1
 _flag_help 1
 argv 'non-opt'  'second non-opt'  '--help'
-count=3
-|non-opt|
-|second non-opt|
-|--help|
 # Implicit int flags work
 _flag_val 123
 argv 'abc'  'def'

tests/read.in

@@ -193,4 +193,4 @@ if test (string length "$x") -ne $FISH_READ_BYTE_LIMIT
 end
 
 echo '# Confirm reading non-interactively works (#4206 regression)'
-echo abc\ndef | ../test/root/bin/fish -i -c 'read a; read b; show $a; show $b'
+echo abc\ndef | ../test/root/bin/fish -i -c 'read a; read b; show a; show b'

tests/read.out

@@ -59,7 +59,7 @@ newline
 # chunked read tests
 Chunked reads test pass
 # Confirm reading non-interactively works (#4206 regression)
-count=1
-|abc|
-count=1
-|def|
+$a count=1
+$a[1]=|abc|
+$b count=1
+$b[1]=|def|

tests/test_functions/show.fish

@@ -1,4 +1,14 @@
-function show
-    echo count=(count $argv)
-    printf '|%s|\n' $argv
+# Show information about the named var(s) passed to us.
+function show --no-scope-shadowing
+    for v in $argv
+        if set -q $v
+            set -l c (count $$v)
+            printf '$%s count=%d\n' $v $c
+            for i in (seq $c)
+                printf '$%s[%d]=|%s|\n' $v $i $$v[1][$i]
+            end
+        else
+            echo \$$v is not set
+        end
+    end
 end