Improve longer operators

Doesn't affect comparison, arithmetic nor logical.

In the match `:+` the `+` became redundant, because it's contained in
`opchar`.

Discovered while working on scala#191.

Author: Jentsch

package.json

@@ -60,7 +60,7 @@
         "build": "npm-run-all build:syntax build:extension",
         "build:syntax": "ts-node src/typescript/GenerateTmLanguageFile.ts > ./syntaxes/Scala.tmLanguage.json",
         "build:extension": "vsce package --yarn",
-        "test": "npm-run-all test:*",
+        "test": "npm-run-all -c test:*",
         "test:unit": "vscode-tmgrammar-test -s source.scala -g syntaxes/Scala.tmLanguage.json -t 'tests/unit/**/*.test.scala'",
         "test:snap": "vscode-tmgrammar-snap -s source.scala -g syntaxes/Scala.tmLanguage.json -t 'tests/snap/**/*.test.scala'",
         "update:snapshots": "vscode-tmgrammar-snap --updateSnapshot -s source.scala -g syntaxes/Scala.tmLanguage.json -t 'tests/snap/**/*.test.scala'"

src/typescript/Scala.tmLanguage.ts

@@ -689,7 +689,7 @@ export const scalaTmLanguage: TmLanguage = {
           name: 'keyword.operator.logical.scala'
         },
         {
-          match: '(<-|←|->|→|=>|⇒|\\?|\\:+|@|\\|)+',
+          match: `(<-|←|->|→|=>|⇒|\\?|\\:|@|\\|)+${opchar}*`,
           name: 'keyword.operator.scala'
         }
       ]

syntaxes/Scala.tmLanguage.json

@@ -36,4 +36,4 @@
   b&&@b
 // ^^^ - keyword.operator.logical.scala
   b@&&b
-// ^^^ - keyword.operator.logical.scala
+// ^^^ - keyword.operator.logical.scala

tests/unit/#182.test.scala

@@ -0,0 +1,6 @@
+// SYNTAX TEST "source.scala"
+
+  seq:+element
+//   ^^ keyword.operator.scala
+  setting := value
+//        ^^ keyword.operator.scala