Spaces not tabs in language.h.

Catch unlikely but possible error and head crash when using
Z_PROBE_REPEATABILITY_TEST

Marlin/SanityCheck.h

      * Require a Z Min pin
      */
     #if Z_MIN_PIN == -1
-      #if Z_PROBE_PIN == -1
+      #if Z_PROBE_PIN == -1 || (! defined (Z_PROBE_ENDSTOP) || defined (DISABLE_Z_PROBE_ENDSTOP)) // It's possible for someone to set a ping for the Z Probe, but not enable it.
         #ifdef Z_PROBE_REPEATABILITY_TEST
           #error You must have a Z_MIN or Z_PROBE endstop to enable Z_PROBE_REPEATABILITY_TEST.
         #else

Marlin/language.h

 #define MSG_Z_MIN                           "z_min: "
 #define MSG_Z_MAX                           "z_max: "
 #define MSG_Z2_MAX                          "z2_max: "
-#define MSG_Z_PROBE							"z_probe: "
+#define MSG_Z_PROBE                         "z_probe: "
 #define MSG_M119_REPORT                     "Reporting endstop status"
 #define MSG_ENDSTOP_HIT                     "TRIGGERED"
 #define MSG_ENDSTOP_OPEN                    "open"