Roll Observatory packages and add a roll script

packages/dart_style/test/regression/0100/0139.unit

+>>>
+class Foo {
+  static const CATEGORIES = const <int>[
+      OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,       // 0-7
+      OTHER, WHITESPACE, WHITESPACE, OTHER, OTHER, WHITESPACE,      // 8-13
+      OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,       // 14-21
+      OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER,       // 22-29
+      OTHER, OTHER, WHITESPACE,                                     // 30-32
+      SYMBOL, OTHER, HASH, ALPHA, SYMBOL, SYMBOL, OTHER,            // !"#$%&´
+      LPAREN, RPAREN, SYMBOL, SYMBOL, COMMA, SYMBOL, DOT, SYMBOL,   // ()*+,-./
+      NUMERIC, NUMERIC, NUMERIC, NUMERIC, NUMERIC,                  // 01234
+      NUMERIC, NUMERIC, NUMERIC, NUMERIC, NUMERIC,                  // 56789
+      COLON, SEMICOLON, SYMBOL, SYMBOL, SYMBOL, QUERY, OTHER,       // :;<=>?@
+      ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA,       // ABCDEFGH
+      ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA,       // IJKLMNOP
+      ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA,       // QRSTUVWX
+      ALPHA, ALPHA, LSQUARE, OTHER, RSQUARE, SYMBOL, ALPHA, OTHER,  // YZ[\]^_'
+      ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA,       // abcdefgh
+      ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA,       // ijklmnop
+      ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA,       // qrstuvwx
+      ALPHA, ALPHA, LBRACE, SYMBOL, RBRACE, SYMBOL];                // yz{|}~
+}
+<<<
+class Foo {
+  static const CATEGORIES = const <int>[
+    OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, // 0-7
+    OTHER, WHITESPACE, WHITESPACE, OTHER, OTHER, WHITESPACE, // 8-13
+    OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, // 14-21
+    OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, OTHER, // 22-29
+    OTHER, OTHER, WHITESPACE, // 30-32
+    SYMBOL, OTHER, HASH, ALPHA, SYMBOL, SYMBOL, OTHER, // !"#$%&´
+    LPAREN, RPAREN, SYMBOL, SYMBOL, COMMA, SYMBOL, DOT, SYMBOL, // ()*+,-./
+    NUMERIC, NUMERIC, NUMERIC, NUMERIC, NUMERIC, // 01234
+    NUMERIC, NUMERIC, NUMERIC, NUMERIC, NUMERIC, // 56789
+    COLON, SEMICOLON, SYMBOL, SYMBOL, SYMBOL, QUERY, OTHER, // :;<=>?@
+    ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, // ABCDEFGH
+    ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, // IJKLMNOP
+    ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, // QRSTUVWX
+    ALPHA, ALPHA, LSQUARE, OTHER, RSQUARE, SYMBOL, ALPHA, OTHER, // YZ[\]^_'
+    ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, // abcdefgh
+    ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, // ijklmnop
+    ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, ALPHA, // qrstuvwx
+    ALPHA, ALPHA, LBRACE, SYMBOL, RBRACE, SYMBOL
+  ]; // yz{|}~
+}