fix escape double quote in msgid issue

[chaomao]

Behavior

If msgid contains double quote, method push_buffer will escape it then parsing. which mismatch the original msgid

let's say we have following msgid contains double quote, say "Hello"

msgid "contains double quote, say \"Hello\""
msgstr "contains double quote, say \"Hello\""

after parsing, content will be

{"contains double quote, say \\\"Hello\\\""=>["contains double quote, say \\\"Hello\\\""]}

the msgid are wrong contains double quote, say \"Hello\"

Analyze

in method push_buffer, value.gsub!(/\\"/, "\"") will trying to fix it, however method gsub will NOT modify the original string object, we should use gsub! instead.

[tboerger]

Good catch, thanks. Since this is potentially a breaking change I think it makes sense to release a mjor version for that.

[chaomao]

thanks :)