Warn for shell expansion of DEFAULT_DESCRIBE.

Author: tapetersen

src/setuptools_scm/git.py

@@ -13,7 +13,10 @@
 from .utils import trace
 from .version import meta
 
-DEFAULT_DESCRIBE = "git describe --dirty --tags --long --match '*[0-9]*'"
+# If testing command in shell make sure to quote the match argument like
+# '*[0-9]*' as it will expand before being sent to git if there are any matching
+# files in current directory.
+DEFAULT_DESCRIBE = ["git", "describe", "--dirty", "--tags", "--long", "--match", "*[0-9]*"]
 
 
 class GitWorkdir(Workdir):