RFR (XS) 8245461: Shenandoah: refine mode name()-s

[Aleksey Shipilev]

RFE:
  https://bugs.openjdk.java.net/browse/JDK-8245461

Fixes a typo in SATB name(), and updates the IU mode to match.

diff -r b620b11f83d7 src/hotspot/share/gc/shenandoah/mode/shenandoahIUMode.hpp
--- a/src/hotspot/share/gc/shenandoah/mode/shenandoahIUMode.hpp Wed May 20 12:01:44 2020 +0200
+++ b/src/hotspot/share/gc/shenandoah/mode/shenandoahIUMode.hpp Wed May 20 14:57:05 2020 +0200
@@ -36,3 +36,3 @@

-  virtual const char* name()     { return "Incremental-Update"; }
+  virtual const char* name()     { return "Incremental-Update (IU)"; }
   virtual bool is_diagnostic()   { return false; }
diff -r b620b11f83d7 src/hotspot/share/gc/shenandoah/mode/shenandoahSATBMode.hpp
--- a/src/hotspot/share/gc/shenandoah/mode/shenandoahSATBMode.hpp       Wed May 20 12:01:44 2020 +0200
+++ b/src/hotspot/share/gc/shenandoah/mode/shenandoahSATBMode.hpp       Wed May 20 14:57:05 2020 +0200
@@ -35,3 +35,3 @@
   virtual ShenandoahHeuristics* initialize_heuristics() const;
-  virtual const char* name()     { return "Snapshot-At-TheBeginning"; }
+  virtual const char* name()     { return "Snapshot-At-The-Beginning (SATB)"; }
   virtual bool is_diagnostic()   { return false; }

Testing: builds

-- 
Thanks,
-Aleksey