all: remove invalid var as string option unwrapping

.github/workflows/docs.yaml

@@ -21,7 +21,7 @@ jobs:
         run: |
           v doc -f html -m .
           pushd _docs
-          ln -vs netaddr.html index.html
+          ln -vs ${{ github.event.repository.name }}.html index.html
           ls -alFh
           popd
 

README.md

@@ -196,8 +196,7 @@ if available. For example (V REPL session):
 fe80::d08e:6658:38bd:6391%wlan0
 >>> ip6_scoped.zone_id
 Option('wlan0')
->>> zone_id := ip6_scoped.zone_id as string
->>> zone_id
+>>> ip6_scoped.zone_id?
 wlan0
 ```
 

ip6.v

@@ -234,8 +234,9 @@ pub fn (a Ipv6Addr) format(fmt Ipv6AddrFormat) string {
 			}
 			if a.zone_id == none {
 				return str.join(':')
+			} else {
+				return str.join(':') + '%' + a.zone_id
 			}
-			return str.join(':') + '%' + (a.zone_id as string)
 		}
 		fmt & .verbose == .verbose {
 			if fmt & .dotted == .dotted {
@@ -253,8 +254,9 @@ pub fn (a Ipv6Addr) format(fmt Ipv6AddrFormat) string {
 			}
 			if a.zone_id == none {
 				return str.join(':')
+			} else {
+				return str.join(':') + '%' + a.zone_id
 			}
-			return str.join(':') + '%' + (a.zone_id as string)
 		}
 		else {
 			return a.str()
@@ -459,8 +461,7 @@ pub:
 
 fn (p Ipv6AddrParams) validate() ! {
 	if p.zone_id != none {
-		zone_id := p.zone_id as string
-		if zone_id.is_blank() || zone_id.contains('%') {
+		if p.zone_id.is_blank() || p.zone_id.contains('%') {
 			return error('zone_id cannot be blank or contain % sign')
 		}
 	}