man.vim: Recognise hyphenated-at-eol cross-references (#12609)
Manual pages requested for output may undergo formatting
arranged by some roff-descendant program. Lines longer
than MANWIDTH or COLUMNS or real-estate width of a device
(with support for horizontal scrolling considered) can be
divided at either blank characters and/or at groups of word
characters (syllables) according to supported hyphenation
rules (although page authors are free to disable hyphenation
or prevent particular words from being hyphenated).
Groff‘s manual describes it as follows:
5.1.2 Hyphenation
Since the odds are not great for finding a set of words, for
every output line, which fit nicely on a line without
inserting excessive amounts of space between words, gtroff
hyphenates words so that it can justify lines without
inserting too much space between words. It uses an internal
hyphenation algorithm (a simplified version of the algorithm
used within TeX) to indicate which words can be hyphenated
and how to do so. When a word is hyphenated, the first part
of the word is added to the current filled line being output
(with an attached hyphen), and the other portion is added to
the next line to be filled.
It would be expedient for autoload/dist/man.vim (along with
syntax/man.vim‘s highlighting and ftplugin/man.vim‘s Ctrl-],
\K mappings) to allow for hyphenation of cross-references
to manual pages.
For example,
# Launch Vim [v9.0; patched: 1-1378, 1499] as follows:
MANWIDTH=80 vim --not-a-term +MANPAGER '+Man man' '+/conv(1)' '+norm B'
# Press Ctrl-] with cursor on _m_: "... use man‐
# conv(1) directly."_______________________[^]
#
# (Man v2.11.2)
# Launch Vim as follows:
MANWIDTH=80 vim --not-a-term +MANPAGER '+Man git' '+/config(1)' '+norm B'
# Press Ctrl-] with cursor on _g_: "... in git-
# config(1) for a more ..."_______________[^]
#
# (Git v2.39.2)
Co-authored-by: Aliaksei Budavei <0x000c70@gmail.com>diff --git a/runtime/syntax/man.vim b/runtime/syntax/man.vim
index 4e08cd7..dfbb35a 100644
--- a/runtime/syntax/man.vim
+++ b/runtime/syntax/man.vim
@@ -20,7 +20,9 @@
syn case ignore
-syn match manReference "\f\+([1-9][a-z]\=)"
+" See notes about hyphenation in s:ParseIntoPageAndSection of
+" autoload/dist/man.vim.
+syn match manReference "\%(\f\+[\u2010-]\%(\n\|\r\n\=\)\s\+\)\=\f\+([1-9]\l*)"
syn match manSectionHeading "^\a.*$"
syn match manSubHeading "^\s\{3\}\a.*$"
syn match manOptionDesc "^\s*[+-][a-z0-9]\S*"