gn2bp: fix comment formatting.

Test: none
Change-Id: Ia9a4c64f3fc90dbc76f9b54d199726ac8324e3f4
diff --git a/tools/gn2bp/gn_utils.py b/tools/gn2bp/gn_utils.py
index 35f3ef2..b3f51c9 100644
--- a/tools/gn2bp/gn_utils.py
+++ b/tools/gn2bp/gn_utils.py
@@ -350,7 +350,8 @@
     elif (desc.get("script", "") in JAVA_BANNED_SCRIPTS
           or self._is_java_group(target.type, target.name)):
       # java_group identifies the group target generated by the android_library
-      # or java_library template. A java_group must not be added as a dependency, but sources are collected
+      # or java_library template. A java_group must not be added as a
+      # dependency, but sources are collected.
       log.debug('Found java target %s', target.name)
       if target.type == "action":
         # Convert java actions into java_group and keep the inputs for collection.