Bug #13353: Backport stringio fixes

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 2.2: DONTNEED, 2.3: DONE, 2.4: DONTNEED

[nobu (Nobuyoshi Nakada)]

Backport r58040 and r58041.

[nobu (Nobuyoshi Nakada)]

• Related to Feature #11094: Remove traces of 6-byte UTF-8 added

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.2: DONTNEED, 2.3: REQUIRED, 2.4: DONTNEED to 2.2: DONTNEED, 2.3: DONE, 2.4: DONTNEED

ruby_2_3 r58160 merged revision(s) 58040,58041.