Description of method assertJsonFileEqualsJsonFile was not corrent and was written in exact opposite way.
Description of method assertJsonStringEqualsJsonFile was not corrent and was written in exact opposite way.
Description of method assertJsonStringEqualsJsonString was not corrent and was written in exact opposite way.
There was a typo in assertContainsOnly method description.

The typo was 'actual value' which should have been 'haystack' instead.
Sync #85 and cleanup.
[ja] Sync with 5ed1013ec42d2c92b7226b5f2130110b8d8caf78

Description of method assertJsonFileEqualsJsonFile was not corrent and was written in exact opposite way.
[ja] Sync with d6b807efbfcc5da3c6160fa1bb6f9959247882f9

Description of method assertJsonStringEqualsJsonFile was not corrent and was written in exact opposite way.
[ja] Sync with a6c9668ae747b2df95955d24f53567de4ea0e3a8

Description of method assertJsonStringEqualsJsonString was not corrent and was written in exact opposite way.
[ja] Sync with 2f7560b3e94e3cff65e0be56b0c78f2bb5bb570f

There was a typo in assertContainsOnly method description.
The typo was 'actual value' which should have been 'haystack' instead.
[ja] Sync with 921fd733d24f846ecec488de2d507a77d3d7a6de

Sync #85 and cleanup.