patch 8.2.4475: fuzzy cmdline completion does not work for lower case

Problem:    Fuzzy cmdline completion does not work for lower case.
Solution:   Also use fuzzy completion for lower case input. (Yegappan
            Lakshmanan, closes #9849)
diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index 73d39e3..c83a8f1 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -2776,6 +2776,18 @@
   delcommand T123FendingOff
   %bw
 
+  " Test for fuzzy completion of a command with lower case letters and a
+  " number
+  command Foo2Bar :
+  set wildoptions=fuzzy
+  call feedkeys(":foo2\<Tab>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"Foo2Bar', @:)
+  call feedkeys(":foo\<Tab>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"Foo2Bar', @:)
+  call feedkeys(":bar\<Tab>\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"Foo2Bar', @:)
+  delcommand Foo2Bar
+
   set wildoptions&
   %bw!
 endfunc