Add test for bug #102

Signed-off-by: Wolfgang E. Sanyer <WolfgangSanyer@Google.com>

Author: ezzieyguywuf

vroom/clangformat.vroom

@@ -181,3 +181,12 @@ current buffer.
 
 The -assume-filename arg passed above is also related, used by the clang-format
 tool to detect any custom style rules particular to the current file.
+
+
+Bug #102. When the buffer is empty, clang-format does _not_ return a cursor
+position
+
+  @clear
+  :call maktaba#error#TryCommand('FormatCode clang-format')
+  ! clang-format -style file .*
+  $ echo -n