Fixes #1974: Correct custom property regexp's so that --foo: \n var(--bar); is supported.

Author: Steven Orvell

src/lib/style-properties.html

@@ -344,15 +344,15 @@
       },
 
       rx: {
-        VAR_ASSIGN: /(?:^|[;\n]\s*)(--[\w-]*?):\s*?(?:([^;{]*?)|{([^}]*)})(?:(?=[;\n])|$)/gim,
-        MIXIN_MATCH: /(?:^|\W+)@apply[\s]*\(([^)]*)\)/im, 
+        VAR_ASSIGN: /(?:^|[;\n]\s*)(--[\w-]*?):\s*(?:([^;{]*)|{([^}]*)})(?:(?=[;\n])|$)/gi,
+        MIXIN_MATCH: /(?:^|\W+)@apply[\s]*\(([^)]*)\)/i, 
         // note, this supports:
         // var(--a)
         // var(--a, --b)
         // var(--a, fallback-literal)
         // var(--a, fallback-literal(with-one-nested-parens))
-        VAR_MATCH: /(^|\W+)var\([\s]*([^,)]*)[\s]*,?[\s]*((?:[^,)]*)|(?:[^;]*\([^;)]*\)))[\s]*?\)/gim,
-        VAR_CAPTURE: /\([\s]*(--[^,\s)]*)(?:,[\s]*(--[^,\s)]*))?(?:\)|,)/gim,
+        VAR_MATCH: /(^|\W+)var\([\s]*([^,)]*)[\s]*,?[\s]*((?:[^,)]*)|(?:[^;]*\([^;)]*\)))[\s]*?\)/gi,
+        VAR_CAPTURE: /\([\s]*(--[^,\s)]*)(?:,[\s]*(--[^,\s)]*))?(?:\)|,)/gi,
         IS_VAR: /^--/,
         BRACKETED: /\{[^}]*\}/g,
         HOST_PREFIX: '(?:^|[^.#[:])',

test/unit/styling-cross-scope-var.html

@@ -91,7 +91,8 @@
       }
 
       #gc4 {
-        --grand-child-scope-var: var(--gc4-scope);
+        --grand-child-scope-var: 
+        var(--gc4-scope);
       }
     </style>