Document ignored arguments section in java dumps

Also, clean up:
* collapse multiple blank lines
* trim trailing whitespace
* expand tabs

Signed-off-by: Keith W. Campbell <keithc@ca.ibm.com>

docs/cmdline_specifying.md

@@ -24,7 +24,6 @@
 
 # OpenJ9 command-line options
 
-
 When you start a Java™ application you can specify various options on the command line to configure the runtime environment. These options include:
 
 - [System properties](d_jvm_commands.md)
@@ -36,7 +35,6 @@ Although the command line is the traditional way to specify command-line options
 
 Options specified on the command line override the equivalent environment variables. For example, specifying `java -cp <dir1>` completely overrides setting the environment variable `CLASSPATH=<dir2>`.
 
-
 ## Quotation marks
 
 Use single or double quotation marks for command-line options only when explicitly directed to do so. Single and double quotation marks have different meanings on different platforms, operating systems, and shells. Do not use `'-X<option>'` or `"-X<option>"`. Instead, you must use `-X<option>`. For example, do not use `'-Xmx500m'` and `"-Xmx500m"`. Write this option as `-Xmx500m`.
@@ -47,7 +45,6 @@ The sequence of the Java options on the command line defines which options take
 
     java -Xint -Xjit myClass
 
-
 At startup, the list of VM arguments is constructed in the following order, with the lowest precedence first:
 
 1.  Certain options are created automatically by the VM, which specify arguments such as search paths and version information. The VM automatically adds `-Xoptionsfile=<path>/options.default` at the beginning of the command line, where `<path>` is the path to the VM directory.
@@ -127,5 +124,4 @@ Here is an extract from a Java core file that shows the options that are used:
 
             export _JAVA_OPTIONS="-Dmysysprop1=tcpip -Dmysysprop2=wait -Xdisablejavadump"
 
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