* README.ja.md: [DOC] fixed wasted spaces by @gogotanaka [fix GH-545][ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45147 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* process.c: [DOC] typo fix by @jkassemi [fix GH-544][ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45148 b2dd03c8-39d4-4d8f-98ff-823fe69b080e