Dpkg::Control::Types: Move constant comments into their own line

This gets rid of the need to align the comments when longer constants
are added, and unifies the style with the rest of the code base.

scripts/Dpkg/Control/Types.pm

@@ -55,16 +55,26 @@ between Dpkg::Control and Dpkg::Control::Fields.
 
 use constant {
     CTRL_UNKNOWN => 0,
-    CTRL_INFO_SRC => 1,      # First control block in debian/control
-    CTRL_INFO_PKG => 2,      # Subsequent control blocks in debian/control
-    CTRL_INDEX_SRC => 4,     # Entry in repository's Packages files
-    CTRL_INDEX_PKG => 8,     # Entry in repository's Sources files
-    CTRL_PKG_SRC => 16,      # .dsc file of source package
-    CTRL_PKG_DEB => 32,      # DEBIAN/control in binary packages
-    CTRL_FILE_CHANGES => 64, # .changes file
-    CTRL_FILE_VENDOR => 128, # File in $Dpkg::CONFDIR/origins
-    CTRL_FILE_STATUS => 256, # $Dpkg::ADMINDIR/status
-    CTRL_CHANGELOG => 512,   # Output of dpkg-parsechangelog
+    # First control block in debian/control.
+    CTRL_INFO_SRC => 1,
+    # Subsequent control blocks in debian/control.
+    CTRL_INFO_PKG => 2,
+    # Entry in repository's Packages files.
+    CTRL_INDEX_SRC => 4,
+    # Entry in repository's Sources files.
+    CTRL_INDEX_PKG => 8,
+    # .dsc file of source package.
+    CTRL_PKG_SRC => 16,
+    # DEBIAN/control in binary packages.
+    CTRL_PKG_DEB => 32,
+    # .changes file.
+    CTRL_FILE_CHANGES => 64,
+    # File in $Dpkg::CONFDIR/origins.
+    CTRL_FILE_VENDOR => 128,
+    # $Dpkg::ADMINDIR/status.
+    CTRL_FILE_STATUS => 256,
+    # Output of dpkg-parsechangelog.
+    CTRL_CHANGELOG => 512,
     # Repository's (In)Release file.
     CTRL_REPO_RELEASE => 1024,
     # Header control block in debian/copyright.