Support angle bracket escaped markdown urls (#1211)

* add angle brackets to regex definition

* revert unecessary change to markdown link suffix

* Update vimwiki.txt

---------

Co-authored-by: Charles Schimmelpfennig <charles.schimmelpfennig@corteva.com>
Co-authored-by: NobleRat <tinmarino@gmail.com>

autoload/vimwiki/vars.vim

@@ -1230,7 +1230,7 @@ function! s:populate_extra_markdown_vars() abort
 
   let mkd_syntax.rxWeblink1Prefix = '['
   let mkd_syntax.rxWeblink1Suffix = ')'
-  let mkd_syntax.rxWeblink1EscapeCharsSuffix = '\(\\\)\@<!\()\)'
+  let mkd_syntax.rxWeblink1EscapeCharsSuffix = '\(\\\)\@<!\(>\=)\)'
   let mkd_syntax.rxWeblink1Separator = ']('
 
   let rxWeblink1Ext = ''
@@ -1255,7 +1255,7 @@ function! s:populate_extra_markdown_vars() abort
   let valid_chars_url = '[^[:cntrl:]]'
 
   let mkd_syntax.rxWeblink1Prefix = vimwiki#u#escape(mkd_syntax.rxWeblink1Prefix)
-  let mkd_syntax.rxWeblink1Separator = vimwiki#u#escape(mkd_syntax.rxWeblink1Separator)
+  let mkd_syntax.rxWeblink1Separator = '\](<\='
   let mkd_syntax.rxWeblink1Url = valid_chars_url.'\{-}'
   let mkd_syntax.rxWeblink1Descr = valid_chars.'\{-}'
   let mkd_syntax.WikiLinkMatchUrlTemplate =

doc/vimwiki.txt

@@ -4000,6 +4000,7 @@ Contributors and their Github usernames in roughly chronological order:
     - Jean-Luc Bastarache (@jlbas)
     - Youssof Taha (@ysftaha)
     - Thomas Leyh (@leyhline)
+    - Charles Schimmelpfennig (@charlesschimmel)
     - nebulaeandstars (@nebulaeandstars)
     - dmitry kim (@jsn)
     - Julian Prein (@druckdev)
@@ -4124,6 +4125,7 @@ New:~
       current file
     * Feature: Add |VimwikiBaddLink| to add links to the buffer list, without
       loading, if they weren't listed yet
+    * PR 1211: Enable parsing Markdown links escaped with angle brackets
 
 Changed:~
     * PR #1047: Allow to replace default mapping of VimwikiToggleListItem