Clarify `srcs` description to make it obvious what file types are accepted.
@@ -47,7 +47,8 @@ public final class AndroidLibraryBaseRule implements RuleDefinition {
public RuleClass build(RuleClass.Builder builder, final RuleDefinitionEnvironment env) {
return builder
/* <!-- #BLAZE_RULE(android_library).ATTRIBUTE(srcs) -->
- The list of source files that are processed to create the target.
+ The list of <code>.java</code> or <code>.srcjar</code> files that
+ are processed to create the target.
<p><code>srcs</code> files of type <code>.java</code> are compiled.
<em>For readability's sake</em>, it is not good to put the name of a
generated <code>.java</code> source file into the <code>srcs</code>.
