Address ShellCheck warning SC1117

.copr/prepare-srpm.sh

@@ -26,7 +26,7 @@ for HASH in sha1 sha256 sha512; do
 done
 
 # Set up *.spec variables based on "configure.ac" (BIND 9.17.2+) or "version" (older BIND versions) extracted from the source tarball.
-eval "$(tar --wildcards --extract --to-stdout --file "${SOURCE_TARBALL}" "*/configure.ac" | sed -nE "s|m4_define\(\[bind_(VERSION_.*?)\], (.*?)\)dnl$|\1=\2|p")"
+eval "$(tar --wildcards --extract --to-stdout --file "${SOURCE_TARBALL}" "*/configure.ac" | sed -nE "s|m4_define\\(\\[bind_(VERSION_.*?)\\], (.*?)\\)dnl$|\\1=\\2|p")"
 eval "$(tar --wildcards --extract --to-stdout --file "${SOURCE_TARBALL}" "*/version" 2>/dev/null)"
 if [[ -n "${MAJORVER}" ]]; then
 	VERSION_MAJOR="${MAJORVER}"