[FAB-11958] Fix minor issues in pvt data tutorial
[FAB-11958] Fix minor issues in pvt data tutorial

Fix minor issues like the following.
- Incorrect indent
- Unnecessary double quotation

Change-Id: I93d6aee85a035f44367b85cf13c46ed2cdf38576
Signed-off-by: Jun Nemoto <0f36410cf31719a35aea513fdc960060bbf0aad2@hitachi.com>

manish-sethi/fabric-sidedb,xixuejia/fabric,muralisrini/fabric,binhn/fabric,jimthematrix/fabric,manish-sethi/fabric,manish-sethi/fabric-sidedb,jimthematrix/fabric,xixuejia/fabric,xixuejia/fabric,muralisrini/fabric,stemlending/fabric,stemlending/fabric,muralisrini/fabric,hyperledger/fabric,binhn/fabric,stemlending/fabric,manish-sethi/fabric-sidedb,stemlending/fabric,binhn/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,hyperledger/fabric