Add toLowerCase to accept more unfortunate errors

[Cherry-picked a9f4008]

Author: Lucas Leblanc

scaladoc/src/dotty/tools/scaladoc/SocialLinks.scala

@@ -14,7 +14,7 @@ object SocialLinks:
     val errorPrefix = s"Social links arg $s is invalid: "
     val splitted = s.split("::")
 
-    splitted.head match {
+    splitted.head.toLowerCase match {
       case "github" if splitted.size == 2 => Right(Github(splitted(1)))
       case "github" => Left(errorPrefix + "For 'github' arg expected one argument: url")
       case "twitter" if splitted.size == 2 => Right(Twitter(splitted(1)))
@@ -25,6 +25,6 @@ object SocialLinks:
       case "discord" => Left(errorPrefix + "For 'discord' arg expected one argument: url")
       case LowercaseNamePattern() if splitted.size == 4 => Right(Custom(splitted(1), splitted(2), splitted(3)))
       case LowercaseNamePattern() if splitted.size == 3 => Right(Custom(splitted(1), splitted(2), splitted(2)))
-      case LowercaseNamePattern() => Left(errorPrefix + "For 'custom' two minimum arguments are expected: url, white icon name, [dark icon name]")
+      case LowercaseNamePattern() => Left(errorPrefix + "For the 'custom' link, a minimum of two arguments is expected: URL, light icon file name, [dark icon file name]")
       case _ => Left(errorPrefix)
     }

scaladoc/test/dotty/tools/scaladoc/SocialLinksTest.scala

@@ -36,12 +36,17 @@ class SocialLinksTest:
     val expected = SocialLinks.Custom("https://custom.com/test", "custom", "custom-dark")
     assertEquals(expected, SocialLinks.parse(customLink).getOrElse(null))
 
+  @Test def customLinkUpper(): Unit =
+    val customLink = "Namecustom::https://custom.com/test::custom"
+    val expected = SocialLinks.Custom("https://custom.com/test", "custom", "custom")
+    assertEquals(expected, SocialLinks.parse(customLink).getOrElse(null))
+
   @Test def parseRegexError(): Unit =
-    val regexErrorLink = "nameCustom::https://custom.com/test::custom::custom-dark::custom"
+    val regexErrorLink = "nameCustom3::https://custom.com/test::custom::custom-dark::custom"
     val expected = s"Social links arg $regexErrorLink is invalid: "
     assertEquals(expected, SocialLinks.parse(regexErrorLink).left.getOrElse(null))
 
   @Test def parseLinkWithError(): Unit =
     val errorLink = "namecustom::https://custom.com/test::custom::custom-dark::custom"
-    val expected = s"Social links arg $errorLink is invalid: For 'custom' two minimum arguments are expected: url, white icon name, [dark icon name]"
+    val expected = s"Social links arg $errorLink is invalid: For the 'custom' link, a minimum of two arguments is expected: URL, light icon file name, [dark icon file name]"
     assertEquals(expected, SocialLinks.parse(errorLink).left.getOrElse(null))