fix(chroma/ssh): treat -R and -Q as flags that take an argument (#91)

The ssh chroma keeps a list of flags whose argument must be skipped, so the
argument is not mistaken for the hostname. Every entry is hyphenated except
two: `Q` and `R` are written bare, so `-Q` and `-R` never match.

For `-R` the consequence is visible. Typing

    ssh -R 5037:localhost:5037 devbox

leaves `5037:localhost:5037` counted as the first non-option token, so it
becomes the hostname. Its trailing `:5037` then matches the host:port check and
the chroma calls `zle -M` with

    Format of hostname incorrect, use -p to pass port number

while you type, on a command line that is perfectly valid. `-L` is in the list
correctly, so the identical local-forward spec highlights fine and only the
remote forward is affected. `-Q` mislabels its argument as the host in the same
way, without reaching the message.

Adds two tests: `-R` must stay silent, and a hostspec that really does carry a
port must still be reported.

Related to #33, which reports `-LRD` forwarding specs highlighting wrongly;
this fixes the `-R` half.

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

tests/main.zunit

@@ -3,6 +3,9 @@
     load "../fast-highlight"
     setopt interactive_comments
     -fast-highlight-fill-option-variables
+    # Chromas are autoloaded functions; the plugin file does this at startup.
+    fpath+=( "$PWD" )
+    autoload -Uz -- '→chroma/-ssh.ch'
 }
 
 @test 'ls /usr/bin' {
@@ -121,4 +124,25 @@ reply=()
     assert "$reply[9]" same_as ""
 }
 
+@test 'ssh -R 5037:localhost:5037 devbox' {
+    reply=()
+    PREBUFFER=""
+    BUFFER="ssh -R 5037:localhost:5037 devbox"
+    evl -fast-highlight-process "$PREBUFFER" "$BUFFER" 0
+
+    # -R takes an argument, so the forward spec is not the hostname and its
+    # trailing :5037 is not a port passed to a hostspec.
+    assert "${FAST_HIGHLIGHT[chroma-ssh-message]}" same_as ""
+}
+
+@test 'ssh devbox:22' {
+    reply=()
+    PREBUFFER=""
+    BUFFER="ssh devbox:22"
+    evl -fast-highlight-process "$PREBUFFER" "$BUFFER" 0
+
+    # A port really passed in the hostspec is still reported.
+    assert "${FAST_HIGHLIGHT[chroma-ssh-message]}" same_as "Format of hostname incorrect, use -p to pass port number"
+}
+
 # vim:ft=zsh:sw=4:sts=4:et

→chroma/-ssh.ch

@@ -51,7 +51,7 @@ local -a match mbegin mend completions_users completions_host
         # Detected option, add style for it.
         [[ "$__wrd" = --* ]] && __style=${FAST_THEME_NAME}double-hyphen-option || \
                                 __style=${FAST_THEME_NAME}single-hyphen-option
-        if [[ "$__wrd" = (-b|-c|-D|-E|-e|-F|-I|-i|-J|-L|-l|-m|-O|-o|-p|Q|R|-S|-W|-w) ]]; then
+        if [[ "$__wrd" = (-b|-c|-D|-E|-e|-F|-I|-i|-J|-L|-l|-m|-O|-o|-p|-Q|-R|-S|-W|-w) ]]; then
             FAST_HIGHLIGHT[chroma-ssh-skip-two]=1
         fi
     else