Tolerate extra semi-colons in import lists

even if they're own their own line (which g-j-f does if it runs with import
cleanup disabled).

PiperOrigin-RevId: 337192414

Author: cushon

core/src/main/java/com/google/googlejavaformat/java/ImportOrderer.java

@@ -346,6 +346,10 @@ private ImportsAndIndex scanImports(int i) throws FormatterException {
           i++;
         }
       }
+      while (tokenAt(i).equals(";")) {
+        // Extra semicolons are not allowed by the JLS but are accepted by javac.
+        i++;
+      }
       imports.add(new Import(importedName, trailing.toString(), isStatic));
       // Remember the position just after the import we just saw, before skipping blank lines.
       // If the next thing after the blank lines is not another import then we don't want to

core/src/test/java/com/google/googlejavaformat/java/ImportOrdererTest.java

@@ -800,6 +800,27 @@ public static Collection<Object[]> parameters() {
             "public class Blim {}",
           },
         },
+        {
+          {
+            "package p;",
+            "",
+            "import java.lang.Bar;",
+            "import java.lang.Baz;",
+            ";",
+            "import java.lang.Foo;",
+            "",
+            "interface Test {}",
+          },
+          {
+            "package p;",
+            "",
+            "import java.lang.Bar;",
+            "import java.lang.Baz;",
+            "import java.lang.Foo;",
+            "",
+            "interface Test {}",
+          }
+        }
       };
       ImmutableList.Builder<Object[]> builder = ImmutableList.builder();
       Arrays.stream(inputsOutputs).forEach(input -> builder.add(createRow(input)));