And that's why hand editing patch files in nano is risky.... make it compile

Spigot-Server-Patches/0426-Activation-Range-Improvements.patch

@@ -34,7 +34,7 @@ index d522d7238d..3a248dbe37 100644
                  this.setMot(Vec3D.a);
              }
 +            // Paper start - ignore movement changes while inactive.
-+            if (isTemporarilyActive && !(entity instanceof EntityItem) && vec3d == getMot() && enummovetype == EnumMoveType.SELF) {
++            if (isTemporarilyActive && !(this instanceof EntityItem) && vec3d == getMot() && enummovetype == EnumMoveType.SELF) {
 +                setMot(Vec3D.a);
 +                return;
 +            }