tests: add testcase for tuple dequoting bug (legacy github bug #186)

tests/lib1/tuple-quoting.pc

@@ -1,4 +1,4 @@
-prefix="/usr"
+prefix="/test"
 libdir=${prefix}/lib
 
 Name: tuple-quoting

tests/parser.sh

@@ -29,7 +29,8 @@ tests_init \
 	fragment_quoting_5 \
 	fragment_quoting_7 \
 	msvc_fragment_quoting \
-	msvc_fragment_render_cflags
+	msvc_fragment_render_cflags \
+	tuple_dequote
 
 comments_body()
 {
@@ -266,3 +267,10 @@ msvc_fragment_render_cflags_body()
 		-o inline:'/I/test/include/foo /DFOO_STATIC \n' \
 		pkgconf --cflags --static --msvc-syntax foo
 }
+
+tuple_dequote_body()
+{
+	atf_check \
+		-o inline:'-L/test/lib -lfoo \n' \
+		pkgconf --with-path="${selfdir}/lib1" --libs tuple-quoting
+}