Perform unicode normalization operations. Options is a list
of operations. Defined operations are:
Unicode Versioning Stability has to be respected.
Compatiblity decomposition (i.e. formatting information is lost)
Return a result with composed characters.
Return a result with decomposed characters.
Strip "default ignorable characters"
Return an error, if the input contains unassigned code
Indicating that NLF-sequences (LF, CRLF, CR, NEL) are
representing a line break, and should be converted to the
unicode character for line separation (LS).
Indicating that NLF-sequences are representing a paragraph
break, and should be converted to the unicode character for
paragraph separation (PS).
Indicating that the meaning of NLF-sequences is unknown.
Strips and/or convers control characters.
NLF-sequences are transformed into space, except if one of
the NLF2LS/PS/LF options is given.
HorizontalTab (HT) and FormFeed (FF) are treated as a
NLF-sequence in this case.
All other control characters are simply removed.
Performs unicode case folding, to be able to do a
case-insensitive string comparison.
Inserts 0xFF bytes at the beginning of each sequence which
is representing a single grapheme cluster (see UAX#29).
(e.g. HYPHEN U+2010 and MINUS U+2212 to ASCII "-").
(See module header for details.)
If NLF2LF is set, this includes a transformation of
paragraph and line separators to ASCII line-feed (LF).
Strips all character markings
(non-spacing, spacing and enclosing) (i.e. accents)
NOTE: this option works only with compose or decompose.
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