'main': Support the non-precommand flags of sudo(8) and ssh-agent(1).

Uses the infrastructure added in the previous commit.

Fixes #678.

highlighters/main/main-highlighter.zsh

@@ -329,15 +329,15 @@ _zsh_highlight_highlighter_main_paint()
     'doas' aCu:Lns # as of OpenBSD's doas(1) dated September 4, 2016
     'nice' n: # as of current POSIX spec
     'pkexec' '' # doesn't take short options; immune to #121 because it's usually not passed --option flags
-    # Argumentless flags that can't be followed by a command: -e -h -K -k -V -v
-    'sudo' Cgprtu:AEHPSbilns # as of sudo 1.8.21p2
+    # Not listed: -h, which has two different meanings.
+    'sudo' Cgprtu:AEHPSbilns:eKkVv # as of sudo 1.8.21p2
     'stdbuf' ioe:
     'eatmydata' ''
     'catchsegv' ''
     'nohup' ''
     'setsid' :wc
-    # As of OpenSSH 8.1p1; -k is deliberately left out since it may not be followed by a command
-    'ssh-agent' aEPt:csDd
+    # As of OpenSSH 8.1p1
+    'ssh-agent' aEPt:csDd:k
     # suckless-tools v44
     # Argumentless flags that can't be followed by a command: -v
     'tabbed' gnprtTuU:cdfhs

highlighters/main/test-data/precommand-killing2.zsh

@@ -35,5 +35,5 @@ BUFFER='sudo -e /does/not/exist'
 expected_region_highlight=(
   '1 4 precommand' # sudo
   '6 7 single-hyphen-option' # -e
-  '9 23 default "issue #678"' # /does/not/exist
+  '9 23 default' # /does/not/exist
 )