fix spurious 'item not found' error in std help (#9197)

…ses).


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See title.  
Fixes #9154 
(despite name of branch)

# User-Facing Changes
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n/a
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crates/nu-std/lib/help.nu

@@ -138,8 +138,8 @@ def show-module [module: record] {
     }
 
     if not ($module.aliases? | is-empty) {
-        print-help-header -n "Exported aliases:"
+        print-help-header "Exported aliases"
-        print $module.aliases
+        print $"    ($module.aliases | str join ', ')"
         print ""
     }
 
@@ -147,7 +147,7 @@ def show-module [module: record] {
         print $"This module (ansi cyan)does not export(ansi reset) environment."
     } else {
         print $"This module (ansi cyan)exports(ansi reset) environment."
-        view source $module.env_block
+        print (view source $module.env_block)
     }
 }
 
@@ -253,6 +253,7 @@ export def "help modules" [
         }
 
         show-module ($found_module | get 0)
+        " " # signal something was shown
     } else {
         $modules
     }
@@ -355,6 +356,7 @@ export def "help aliases" [
         }
 
         show-alias ($found_alias | get 0)
+        " " # signal something was shown
     } else {
         $aliases
     }
@@ -393,6 +395,7 @@ export def "help externs" [
         }
 
         show-extern ($found_extern | get 0)
+        " " # signal something was shown
     } else {
         $externs
     }
@@ -457,6 +460,7 @@ export def "help operators" [
         }
 
         show-operator ($found_operator | get 0)
+        " " # signal something was shown
     } else {
         $operators
     }
@@ -666,6 +670,7 @@ export def "help commands" [
         }
 
         show-command ($found_command | get 0)
+        " " # signal something was shown
     } else {
         $commands | select name category usage signatures search_terms
     }