dev-python/rfc3987: only depend on dev-python/regex w/o pypy

Falls back to re with less functionality if unavailable.

Signed-off-by: Sam James <sam@gentoo.org>

dev-python/rfc3987/rfc3987-1.3.8-r2.ebuild

@@ -18,8 +18,12 @@ LICENSE="GPL-3"
 SLOT="0"
 KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux ~arm64-macos ~x64-macos"
 
+# dev-python/regex doesn't support pypy. The package falls back to re and has most
+# functionality without it.
 RDEPEND="
-	dev-python/regex[${PYTHON_USEDEP}]
+	$(python_gen_cond_dep '
+		dev-python/regex[${PYTHON_USEDEP}]
+	' 'python*')
 "
 BDEPEND="
 	${RDEPEND}