fix(doc): don't use method call syntax in examples

The method call syntax patches aren't ported yet.

runtime/doc/map.txt

@@ -855,7 +855,7 @@ Here is an example that counts the number of spaces with <F4>: >
 	    set clipboard= selection=inclusive
 	    let commands = #{line: "'[V']y", char: "`[v`]y", block: "`[\<c-v>`]y"}
 	    silent exe 'noautocmd keepjumps normal! ' .. get(commands, a:type, '')
-	    echom getreg('"')->count(' ')
+	    echom count(getreg('"'), ' ')
 	  finally
 	    call setreg('"', reg_save)
 	    call setpos("'<", visual_marks_save[0])

runtime/doc/tips.txt

@@ -462,7 +462,7 @@ the current window, try this custom `:HelpCurwin` command:
 	    execute mods .. ' helpclose'
 	    let s:did_open_help = v:true
 	  endif
-	  if !getcompletion(a:subject, 'help')->empty()
+	  if !empty(getcompletion(a:subject, 'help'))
 	    execute mods .. ' edit ' .. &helpfile
 	  endif
 	  return 'help ' .. a:subject