TST: Moving comment of Issue number below def as per review notes (pandas-dev#21295)

Author: atulagrwl

pandas/tests/test_common.py

@@ -169,8 +169,8 @@ def test_compression_warning(compression_only):
                 df.to_csv(f, compression=compression_only)
 
 
-# GH 21295
 def test_git_version():
+    # GH 21295
     git_version = pd.__git_version__
     assert len(git_version) == 40
     assert all(c in string.hexdigits for c in git_version)