Make pretty-expanded-hygiene a ui test

`normalize-stdout-test` removes the need for Make, and it can be updated
with `--bless` this way

src/test/run-make-fulldeps/pretty-expanded-hygiene/Makefile

@@ -1,21 +0,0 @@
--include ../tools.mk
-
-REPLACEMENT := s/[0-9][0-9]*\#[0-9][0-9]*/$(shell date)/g
-
-all:
-	$(RUSTC) -o $(TMPDIR)/input.out -Z unstable-options \
-		--pretty expanded,hygiene input.rs
-
-	# the name/ctxt numbers are very internals-dependent and thus
-	# change relatively frequently, and testing for their exact values
-	# them will fail annoyingly, so we just check their positions
-	# (using a non-constant replacement like this will make it less
-	# likely the compiler matches whatever other dummy value we
-	# choose).
-	#
-	# (These need to be out-of-place because OSX/BSD & GNU sed
-	# differ.)
-	sed "$(REPLACEMENT)" input.pp.rs > $(TMPDIR)/input.pp.rs
-	sed "$(REPLACEMENT)" $(TMPDIR)/input.out > $(TMPDIR)/input.out.replaced
-
-	diff -u $(TMPDIR)/input.out.replaced $(TMPDIR)/input.pp.rs

src/test/ui/hygiene/unpretty-debug.rs

@@ -1,3 +1,9 @@
+// check-pass
+// compile-flags: -Zunpretty=expanded,hygiene
+
+// Don't break whenever Symbol numbering changes
+// normalize-stdout-test "\d+#" -> "0#"
+
 // minimal junk
 #![feature(no_core)]
 #![no_core]

src/test/ui/hygiene/unpretty-debug.stdout

@@ -1,3 +1,9 @@
+// check-pass
+// compile-flags: -Zunpretty=expanded,hygiene
+
+// Don't break whenever Symbol numbering changes
+// normalize-stdout-test "\d+#" -> "0#"
+
 // minimal junk
 #![feature /* 0#0 */(no_core)]
 #![no_core /* 0#0 */]