allow whitespace after variable name in declaration

src/lib.rs

@@ -531,6 +531,7 @@ pub(crate) fn eat_expr<I: Iterator<Item = Token>>(
                     continue;
                 }
                 let name = eat_ident_no_interpolation(toks)?;
+                devour_whitespace(toks);
                 if toks.peek().unwrap().kind == ':' {
                     toks.next();
                     devour_whitespace(toks);

tests/variables.rs

@@ -112,3 +112,8 @@ test!(
     "$input: foo;\na {\n  color: $input#{\"literal\"};\n}\n",
     "a {\n  color: foo literal;\n}\n"
 );
+test!(
+    whitespace_after_variable_name_in_declaration,
+    "a {\n  $x : true;\n  color: $x;\n}\n",
+    "a {\n  color: true;\n}\n"
+);