Fix typo
s/[1][1]/[1]/
Fix typo
Merge pull request #13 from takiy33/fix_typo_class.md

Fix typo
Merge pull request #12 from takiy33/fix_typo_array.md_2

s/[1][1]/[1]/
Merge pull request #11 from takiy33/fix_typo_array.md

Fix typo