How to replace value of password tag in xml with blanks when special characters are there?

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sub in an awk statement, yes. gsub isn't necessary, I realized, just plain sub. So if you're doing 37 operations in awk already, you could just add one more for less performance hit than adding another pipe chain.
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Test Your Knowledge in Computers #413
Difficulty: Medium
The AT&T 3B1, also known as the PC7300 or UNIX PC, was a desktop workstation computer based on the Motorola MC68010 microprocessor, running an operating system from Convergent Technology (based on Unix System V Release 2).
True or False?

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Normalize::Text::Music_Fields(3pm)			User Contributed Perl Documentation			Normalize::Text::Music_Fields(3pm)

Normalize::Text::Music_Fields - normalize names of people's and (musical) works. SYNOPSIS
$name = $obj->Normalize::Text::Music_Fields::normalize_person($name); $work = $obj->Normalize::Text::Music_Fields::normalize_piece($work); # $obj should have methods `name_for_field_normalization', 'shorted_person' DESCRIPTION
Databases of names and of works-per-name are taken from plain-text files (optionally in mail-header format). Names are stored in *.lst files. Works are stored in .comp files named after the shortened name of the composer. The directories of these files are looked in the environment variable "MUSIC_FIELDS_PATH" (if defined, split the same way as "PATH"), or in "$ENV{HOME}/.music_fields", and "-" (and "-" is replaced by the directory named as the module file with .pm dropped). At runtime, one can replace the list by calling function Normalize::Text::Music_Fields::set_path() with the list of directories as the argument. (Since parsed files are cached, replacing the directory list should be done as early as possible.) Files may be managed with utility subroutines provided with the module: # Translate from one-per-line to mail-header format: perl -wple "BEGIN {print q(# format = mail-header)} s/#s*normalizeds*$//; $_ = qq(Title: $_) unless /^s*(#|$)/; $_ = qq( $_) if $p and not /^##/; $_ .= qq( ) unless $p = /^##/" Normalize::Text::Music_Fields-G_Gershwin.comp >Music_Fields-G_Gershwin.comp-mail # (inverse transformation:) Dump pieces listed in mail-header format perl -MNormalize::Text::Music_Fields -wle "print for Normalize::Text::Music_Fields::read_composer_file(shift, shift)" gershwin Music_Fields-G_Gershwin.comp-mail > o # Normalize data in 1-line-per piece format perl -MNormalize::Text::Music_Fields -wle "Normalize::Text::Music_Fields::prepare_tag_object_comp(shift)->Normalize::Text::Music_Fields::normalize_file_lines(shift)" # Create a mail-header file from a semi-processed (with "bold" fields) # mail-header file (with xml escapes, preceded by opus number) perl -MNormalize::Text::Music_Fields -00wnle "BEGIN {$tag = Normalize::Text::Music_Fields::prepare_tag_object_comp(shift @ARGV); print q(# format = mail-header)} print Normalize::Text::Music_Fields::emit_as_mail_header($tag,$_, q(bold,xml,opus),$pre)" shostakovich o-xslt-better >Music_Fields-D_Shostakovich.comp-mail1 # Likewise, from work-per-line with opus-numbers: perl -MNormalize::Text::Music_Fields -wnle "BEGIN {$tag = Normalize::Text::Music_Fields::prepare_tag_object_comp(shift @ARGV); print qq(# format = mail-header )} print Normalize::Text::Music_Fields::emit_as_mail_header($tag,$_, q(opus), $pre)" schnittke o-schnittke-better >Music_Fields-A_Schnittke.comp-mail2 # A primitive tool for merging additional info into the database: perl -MNormalize::Text::Music_Fields -wnle "BEGIN {$tag = Normalize::Text::Music_Fields::prepare_tag_object_comp(shift @ARGV); print qq(# format = mail-header )} next unless s/^s*++s*//; print Normalize::Text::Music_Fields::merge_info($tag,$_, q(opus,xml), qr(^(58|70|76|116|118|119)($|-)))" brahms o-brahms-op-no1-xslt # Minimal consistency check of persons database. perl -MNormalize::Text::Music_Fields -wle "BEGIN{binmode $_, ':encoding(cp866)' for *STDIN, *STDOUT, *STDERR} print Normalize::Text::Music_Fields->check_persons" # Minimal testing code: perl -MNormalize::Text::Music_Fields -e Normalize::Text::Music_Fields::test_normalize_piece It may be easier to type these examples if one uses "", which exports the mentioned subroutines to the main namespace (available in examples directory of a distribution of "MP3::Tag"). E.g., the last example becomes: perl -Mmanage_M_N_F -e test_normalize_piece perl v5.14.2 2009-05-08 Normalize::Text::Music_Fields(3pm)