Remove extra newlines that might be in string

Author: eflumerf

rc/control/utilities.py

@@ -721,7 +721,7 @@ def parse_buildinfo_file(buildinfo_filename):
                 break
 
         if found_spack_package:
-            package_dir = stdoutlines[package_line_number]
+            package_dir = stdoutlines[package_line_number].strip()
 
             buildinfo_file = f"{package_dir}/source/{pkgname}/BuildInfo/GetPackageBuildInfo.cc"