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Returns a printable version of +self+, enclosed in double-quotes.
Most printable characters are rendered simply as themselves:
'abc'.inspect # => "\"abc\""
'012'.inspect # => "\"012\""
''.inspect # => "\"\""
"\u000012".inspect # => "\"\\u000012\""
'тест'.inspect # => "\"тест\""
'こんにちは'.inspect # => "\"こんにちは\""
But printable characters double-quote (<tt>'"'</tt>) and backslash and (<tt>'\\'</tt>) are escaped:
'"'.inspect # => "\"\\\"\""
'\\'.inspect # => "\"\\\\\""
Unprintable characters are the {ASCII characters}[https://en.wikipedia.org/wiki/ASCII]
whose values are in range <tt>0..31</tt>,
along with the character whose value is +127+.
Most of these characters are rendered thus:
0.chr.inspect # => "\"\\x00\""
1.chr.inspect # => "\"\\x01\""
2.chr.inspect # => "\"\\x02\""
# ...
A few, however, have special renderings:
7.chr.inspect # => "\"\\a\"" # BEL
8.chr.inspect # => "\"\\b\"" # BS
9.chr.inspect # => "\"\\t\"" # TAB
10.chr.inspect # => "\"\\n\"" # LF
11.chr.inspect # => "\"\\v\"" # VT
12.chr.inspect # => "\"\\f\"" # FF
13.chr.inspect # => "\"\\r\"" # CR
27.chr.inspect # => "\"\\e\"" # ESC
Related: see {Converting to Non-String}[rdoc-ref:String@Converting+to+Non--5CString].
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