Chapter 1

Some corrections.
Corrections
Typo
Typos
Typo
Typo
Typos
Line break
Merge branch '2.11' into 3.0
Typos
Typo
Added additional example for iflng tags
Merge branch '2.11' into 3.0
Merge branch '3.0' into 3.0-ja.
Catch up to 97f8c87ca660ae1cc14f92a57957d96f75542eb5.
Fix typo.