Merge branch 'jk/wrap-perl-used-in-tests'

* jk/wrap-perl-used-in-tests:
  t: use perl instead of "$PERL_PATH" where applicable
  t: provide a perl() function which uses $PERL_PATH

t/t5551-http-fetch.sh

@@ -235,7 +235,7 @@ test_expect_success EXPENSIVE 'create 50,000 tags in the repo' '
 	done | git fast-import --export-marks=marks &&
 
 	# now assign tags to all the dangling commits we created above
-	tag=$("$PERL_PATH" -e "print \"bla\" x 30") &&
+	tag=$(perl -e "print \"bla\" x 30") &&
 	sed -e "s|^:\([^ ]*\) \(.*\)$|\2 refs/tags/$tag-\1|" <marks >>packed-refs
 	)
 '