patch 7.4.2174
Problem: Adding duplicate flags to 'whichwrap' leaves commas behind.
Solution: Also remove the commas. (Naruhiko Nishino)
diff --git a/src/testdir/test_options.vim b/src/testdir/test_options.vim
new file mode 100644
index 0000000..cceb180
--- /dev/null
+++ b/src/testdir/test_options.vim
@@ -0,0 +1,40 @@
+" Test for options
+
+function! Test_whichwrap()
+ set whichwrap=b,s
+ call assert_equal('b,s', &whichwrap)
+
+ set whichwrap+=h,l
+ call assert_equal('b,s,h,l', &whichwrap)
+
+ set whichwrap+=h,l
+ call assert_equal('b,s,h,l', &whichwrap)
+
+ set whichwrap+=h,l
+ call assert_equal('b,s,h,l', &whichwrap)
+
+ set whichwrap&
+endfunction
+
+function! Test_options()
+ let caught = 'ok'
+ try
+ options
+ catch
+ let caught = v:throwpoint . "\n" . v:exception
+ endtry
+ call assert_equal('ok', caught)
+
+ " close option-window
+ close
+endfunction
+
+function! Test_path_keep_commas()
+ " Test that changing 'path' keeps two commas.
+ set path=foo,,bar
+ set path-=bar
+ set path+=bar
+ call assert_equal('foo,,bar', &path)
+
+ set path&
+endfunction