display git improper version string as debug

vendor/lib/lib_git.cmd

@@ -55,7 +55,7 @@ exit /b
             set "GIT_VERSION=%%C"
         ) else (
             echo "'git --version' returned an improper version string!"
-            echo "executable: %git_executable%"
+            %print_debug% :read_version "returned string: '%%A %%B %%C' by executable path: %git_executable%"
             pause
             exit /b
         )