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This renames the "underlined" style to "net-address": * Default styles all have logical/functional names, e.g. "constant", "function". The "underlined" style is the only one with a stylistic name. * Almost all current uses of the "underlined" style are for URLs or email addresses. The only non-address use of the "underlined" style is for "markup-emphasis" in asciidoc.lang. This also changes this mapping to "def:doc-comment-element" (following markdown.lang). This also keeps the "underlined" style, mapping it to "net-address", for backwards-compatibility with third-party language definitions.
adc85255