---input---
[Section A]
KeyOne=value 1
KeyTwo=value 2

# a comment

[Section B]
Setting="something" "some thing" "…"
KeyTwo=value 2 \
       value 2 continued

[Section C]
KeyThree=value 3\
# this line is ignored
; this line is ignored too
       value 3 continued

---tokens---
'[Section A]' Keyword
'\n'          Text.Whitespace

'KeyOne'      Name.Attribute
'='           Operator
'value 1'     Literal.String
'\n'          Text.Whitespace

'KeyTwo'      Name.Attribute
'='           Operator
'value 2'     Literal.String
'\n'          Text.Whitespace

'\n'          Text.Whitespace

'# a comment' Comment.Single
'\n'          Text.Whitespace

'\n'          Text.Whitespace

'[Section B]' Keyword
'\n'          Text.Whitespace

'Setting'     Name.Attribute
'='           Operator
'"something" "some thing" "…"' Literal.String
'\n'          Text.Whitespace

'KeyTwo'      Name.Attribute
'='           Operator
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'\\'          Text
'\n'          Text.Whitespace

'       '     Text.Whitespace
'value 2 continued' Literal.String
'\n'          Text.Whitespace

'\n'          Text.Whitespace

'[Section C]' Keyword
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'KeyThree'    Name.Attribute
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'\\'          Text
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'# this line is ignored' Comment.Single
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'; this line is ignored too' Comment.Single
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'       '     Text.Whitespace
'value 3 continued' Literal.String
'\n'          Text.Whitespace