doc: improve match pattern for manual page references with custom_see_handler.

* doc/doc.md: Use '[%w_]+' instead of '%a+' so that references
to, say, _exit(2) and dup2(2) work too.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
issue #139; improved lookup for class methods; args override now only kicks if the argument does not have its default value
Merge pull request #129 from gvvaughan/pull-request/custom_see_hander-doc-fix

doc: improve match pattern for manual page references with custom_see_handler.
Merge branch 'master' of github.com:stevedonovan/LDoc
Issue #137 boilerplate Lua block comment
Issue #145: do not expand annotations if there's no previous item
Resolve issue #22 'In-line links with underscores are broken'
Merge pull request #149 from vanzomerenc/master

Resolve issue #22 'In-line links with underscores are broken'
Issue #150: 'info' section ordering is now consistent
html: case sensitive file systems require matching require args.

* ldoc/html.lua: Make sure to `require 'pl.OrderedMap'` (with a
capital 'O') to match the filename installed by penlight.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
Merge pull request #151 from gvvaughan/pull-request/case-sensitive-filesystems

html: case sensitive file systems require matching require args.
updated changes.md - preparing for release
Updated LuaDoc url
Updated LuaDoc canonical URL
Merge pull request #154 from kernelp4nic/master

Updated LuaDoc url
bumped version to 1.4.2
kind_names variable can override names used in sidebar, e.g. 'kind_names={topic='Manual'}' will override default of 'Topics'