fix so that the 'v' prefix does not show up in the version strings

Author: grlee77

pyfftw/_version.py

@@ -41,7 +41,7 @@ def get_config():
     cfg = VersioneerConfig()
     cfg.VCS = "git"
     cfg.style = "pep440"
-    cfg.tag_prefix = ""
+    cfg.tag_prefix = "v"
     cfg.parentdir_prefix = "pyfftw-"
     cfg.versionfile_source = "pyfftw/_version.py"
     cfg.verbose = False

setup.cfg

@@ -3,5 +3,5 @@ VCS = git
 style = pep440
 versionfile_source = pyfftw/_version.py
 versionfile_build = pyfftw/_version.py
-tag_prefix =
+tag_prefix = v
 parentdir_prefix = pyfftw-