More asciidoc errors

docs/reference/setup/sysconfig/heap_size.asciidoc

@@ -26,21 +26,23 @@ your server. Good rules of thumb are:
   object pointers (compressed oops); the exact cutoff varies but is
   near 32 GB. You can verify that you are under the limit by looking
   for a line in the logs like the following:
-
++
     heap size [1.9gb], compressed ordinary object pointers [true]
 
 * Even better, try to stay below the threshold for zero-based
   compressed oops; the exact cutoff varies but 26 GB is safe on most
-  systems, but can be as large as 30 GB on some system. You can verify
+  systems, but can be as large as 30 GB on some systems. You can verify
   that you are under the limit by starting Elasticsearch with the JVM
-  options "-XX:+UnlockDiagnosticVMOptions -XX:+PrintCompressedOopsMode"
+  options `-XX:+UnlockDiagnosticVMOptions -XX:+PrintCompressedOopsMode`
   and looking for a line like the following:
-
++
+--
     heap address: 0x000000011be00000, size: 27648 MB, zero based Compressed Oops
 
-  showing that zero-based compressed oops are enabled instead of
+showing that zero-based compressed oops are enabled instead of
 
     heap address: 0x0000000118400000, size: 28672 MB, Compressed Oops with base: 0x00000001183ff000
+--
 
 Here are examples of how to set the heap size via the jvm.options file:
 
@@ -62,4 +64,4 @@ ES_JAVA_OPTS="-Xms2g -Xmx2g" ./bin/elasticsearch <1>
 ES_JAVA_OPTS="-Xmx4000mb -Xmx4000mb" ./bin/elasticsearch <2>
 ------------------
 <1> Set the minimum and maximum heap size to 2 GB.
-<1> Set the minimum and maximum heap size to 4000 MB.
+<2> Set the minimum and maximum heap size to 4000 MB.