decorate: clean up and document API

Improve the names of the identifiers in decorate.h, document them, and
add an example of how to use these functions.

The example is compiled and run as part of the test suite.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/t/t9004-example.sh b/t/t9004-example.sh
new file mode 100755
index 0000000000..b28a028f55
--- /dev/null
+++ b/t/t9004-example.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+test_description='check that example code compiles and runs'
+. ./test-lib.sh
+
+test_expect_success 'decorate' '
+	test-example-decorate
+'
+
+test_done