This patch has two changes for cb.

It avoids special processing for a colon that is followed by another colon.
If you are forced to look at C++ code, then you sometimes want to hit small
fragements of it with cb.  This patch prevents identifiers a::b from being
broken up.

It prefixes split lines with tab rather than four spaces.  This looks better
in acme.

Reference: /n/sources/patch/applied/cb-col-split
Date: Thu Sep 22 12:50:03 CES 2005

--- /sys/src/cmd/cb/cb.c	Thu Sep 22 12:40:35 2005
+++ /sys/src/cmd/cb/cb.c	Thu Sep 22 12:40:34 2005
@@ -466,6 +466,11 @@
 			gotop(c);
 			continue;
 		case ':':
+			if ((cc = getch()) == ':') {
+				putch(c,NO);
+				putch(cc,NO);
+				continue;
+			}
 			if (question == 1){
 				question = 0;
 				gotop(c);
@@ -796,7 +801,7 @@
 			lbegin = 0;
 			if (split == 1){
 				split = 0;
-				if (clev->tabs > 0)Bprint(output, "    ");
+				if (clev->tabs > 0)Bprint(output, "\t");
 			}
 		}
 		*p = '\0';