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[DOC] Enhanced RDoc for String (#5685)

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Treats:

    #chars
    #codepoints
    #each_char
    #each_codepoint
    #each_grapheme_cluster
    #grapheme_clusters

Also, corrects a passage in #unicode_normalize that mentioned module UnicodeNormalize, whose doc (:nodoc:, actually) says not to mention it.
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Burdette Lamar 2022-03-22 14:51:05 -05:00 • committed by GitHub
parent 26aff37466
commit 0140e6c41e
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Notes: git 2022-03-23 04:51:26 +09:00 
Merged-By: BurdetteLamar <BurdetteLamar@Yahoo.com>
7 changed files with 88 additions and 58 deletions
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doc/string/grapheme_clusters.rdoc Normal file
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@ -0,0 +1,6 @@
Returns an array of the grapheme clusters in +self+
(see {Unicode Grapheme Cluster Boundaries}[https://www.unicode.org/reports/tr29/#Grapheme_Cluster_Boundaries]):
s = "\u0061\u0308-pqr-\u0062\u0308-xyz-\u0063\u0308" # => "ä-pqr-b̈-xyz-c̈"
s.grapheme_clusters
# => ["ä", "-", "p", "q", "r", "-", "b̈", "-", "x", "y", "z", "-", "c̈"]