remkop#148 Fix infinite loop when word is too large for column

Splits the word naively at the column boundary.

src/main/java/picocli/CommandLine.java

@@ -3040,6 +3040,10 @@ private int copy(BreakIterator line, Text text, Text columnValue, int offset) {
                         break;
                     }
                 }
+                if (done == 0 && length(text) > columnValue.maxLength) {
+                    // The value is a single word that is too big to be written to the column. Write as much as we can.
+                    done = copy(text, columnValue, offset);
+                }
                 return done;
             }
             private static int copy(Text value, Text destination, int offset) {

src/test/java/picocli/CommandLineTest.java

@@ -32,6 +32,7 @@
 import java.net.URL;
 import java.net.UnknownHostException;
 import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.sql.Time;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
@@ -2774,4 +2775,31 @@ class App {
         assertFalse(app.objectTrue);
         assertTrue(app.objectNull);
     }
+
+    @Test(timeout = 15000)
+    public void testIssue148InfiniteLoop() throws Exception {
+        @Command(showDefaultValues = true)
+        class App {
+            @Option(names = "--foo-bar-baz")
+            String foo = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
+            // Default value needs to be at least 1 character larger than the "WRAP" column in TextTable(Ansi), which is
+            // currently 51 characters. Going with 81 to be safe.
+        }
+
+        ByteArrayOutputStream output = new ByteArrayOutputStream();
+        PrintStream printStream = new PrintStream(output);
+        CommandLine.usage(new App(), printStream);
+
+        String content = new String(output.toByteArray(), "UTF-8")
+                .replaceAll("\r\n", "\n"); // Normalize line endings.
+
+        String expectedOutput =
+                "Usage: <main class> [--foo-bar-baz=<foo>]\n" +
+                "      --foo-bar-baz=<foo>       Default:\n" +
+                "                                aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n" +
+                "                                aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n" +
+                "\n";
+
+        assertEquals(expectedOutput, content);
+    }
 }