Fix introduction of pre-release handling

We need to release specfile to be able to handle
the pre-release syntax.

Author: majamassarini

epel8/python-specfile.spec

@@ -4,10 +4,10 @@ Main focus is on modifying existing spec files, any change should result
 in a minimal diff.}
 
 
-%global base_version 0.26.0
+%global base_version 0.27.0
 #global prerelease   rc1
 
-%global package_version 0.27.0
+%global package_version %{base_version}%{?prerelease:~%{prerelease}}
 %global pypi_version    %{base_version}%{?prerelease}
 
 

fedora/python-specfile.spec

@@ -7,10 +7,10 @@ Main focus is on modifying existing spec files, any change should result
 in a minimal diff.}
 
 
-%global base_version 0.26.0
+%global base_version 0.27.0
 #global prerelease   rc1
 
-%global package_version 0.27.0
+%global package_version %{base_version}%{?prerelease:~%{prerelease}}
 %global pypi_version    %{base_version}%{?prerelease}