Fix "update.sh" handling of whitespace on SHA256 scraping

See view-source:https://www.ruby-lang.org//en/news/2019/04/01/ruby-2-4-6-released/ ("SHA256:" has whitespace before it)

Author: tianon

update.sh

@@ -45,15 +45,15 @@ for version in "${versions[@]}"; do
 	for tryVersion in "${allVersions[@]}"; do
 		if \
 			{
-				versionReleasePage="$(echo "$releasesPage" | grep "<td>Ruby $tryVersion</td>" -A 2 | awk -F '"' '$1 == "<td><a href=" { print $2; exit }')" \
+				versionReleasePage="$(grep "<td>Ruby $tryVersion</td>" -A 2 <<<"$releasesPage" | awk -F '"' '$1 == "<td><a href=" { print $2; exit }')" \
 					&& [ "$versionReleasePage" ] \
-					&& shaVal="$(curl -fsSL "https://www.ruby-lang.org/$versionReleasePage" |tac|tac| grep "ruby-$tryVersion.tar.xz" -A 5 | awk '/^SHA256:/ { print $2; exit }')" \
+					&& shaVal="$(curl -fsSL "https://www.ruby-lang.org/$versionReleasePage" |tac|tac| grep "ruby-$tryVersion.tar.xz" -A 5 | awk '$1 == "SHA256:" { print $2; exit }')" \
 					&& [ "$shaVal" ]
 			} \
 			|| {
 				versionReleasePage="$(echo "$newsPage" | grep -oE '<a href="[^"]+">Ruby '"$tryVersion"' Released</a>' | cut -d'"' -f2)" \
 					&& [ "$versionReleasePage" ] \
-					&& shaVal="$(curl -fsSL "https://www.ruby-lang.org/$versionReleasePage" |tac|tac| grep "ruby-$tryVersion.tar.xz" -A 5 | awk '/^SHA256:/ { print $2; exit }')" \
+					&& shaVal="$(curl -fsSL "https://www.ruby-lang.org/$versionReleasePage" |tac|tac| grep "ruby-$tryVersion.tar.xz" -A 5 | awk '$1 == "SHA256:" { print $2; exit }')" \
 					&& [ "$shaVal" ]
 			} \
 		; then