Merge "docs: corrected code example mistakes" into oc-dev

     * Example:

     * Example:

     *

     *

     * <pre class="prettyprint">

     * <pre class="prettyprint">

     * Calendar start = new Calendar();

     * Calendar start = Calendar.getInstance();

     * Calendar end = new Calendar();

     * Calendar end = Calendar.getInstance();

     * end.add(1, Calendar.YEAR);

     * end.add(Calendar.YEAR, 1);

     *

     *

     * KeyPairGeneratorSpec spec =

     * KeyPairGeneratorSpec spec =

     *         new KeyPairGeneratorSpec.Builder(mContext).setAlias("myKey")

     *         new KeyPairGeneratorSpec.Builder(mContext).setAlias("myKey")

     *                 .setSubject(new X500Principal("CN=myKey")).setSerial(BigInteger.valueOf(1337))

     *                 .setSubject(new X500Principal("CN=myKey")).setSerialNumber(BigInteger.valueOf(1337))

     *                 .setStartDate(start.getTime()).setEndDate(end.getTime()).build();

     *                 .setStartDate(start.getTime()).setEndDate(end.getTime()).build();

     * </pre>

     * </pre>

     *

     *