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Build Identifier: 

The systemd specfile I have is seen here: http://pkgs.fedoraproject.org/cgit/rpms/systemd.git/tree/systemd.spec#n27

rpm (version 4.8.0 on CentOS 6.&) is unable to parse this specfile. See output below.

Reproducible: Always

Steps to Reproduce:
1. download systemd specfile
2. run `rpm -q --qf "%{Name}" --specfile ~/systemd/specfiles/systemd.spec`
Actual Results:  
error: line 217: second %prep
error: query of specfile ~/systemd/specfiles/systemd.spec failed, can't parse

Expected Results:  
systemdsystemd-libssystemd-compat-libssystemd-pamsystemd-develsystemd-udevsystemd-containersystemd-journal-remotesystemd-debuginfo

According to http://www.rpm.org/max-rpm-snapshot/ch-rpm-inside.html, the %prep macro on the comment line needs to be escaped:
"Comments can be placed in any section of the spec file. Note that macros are expanded everywhere, so with multiline macros which would only have the first line commented also escape the percent (%) character:"

Changing '%prep' to '%%prep' on line 27 fixes the parsing.
$ rpm -q --qf "%{Name}" --specfile ~/systemd/specfiles/systemd.spec
systemdsystemd-libssystemd-compat-libssystemd-pamsystemd-develsystemd-udevsystemd-containersystemd-journal-remotesystemd-debuginfo