code review 7461046: all: fix typos

src/cmd/6c/peep.c

 // Inferno utils/6c/peep.c
 // http://code.google.com/p/inferno-os/source/browse/utils/6c/peep.c
 //
 //      Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
 //      Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
 //      Portions Copyright © 1997-1999 Vita Nuova Limited
 //      Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
 //      Portions Copyright © 2004,2006 Bruce Ellis
 //      Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
 //      Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
@@ skipping 465 matching lines @@
                 p = r->prog;
                 if(debug['P'])
                         print("%P", p);
                 if(!f && uniqp(r) == R) {
                         f = 1;
                         if(debug['P'])
                                 print("; merge; f=%d", f);
                 }
                 t = copyu(p, v2, A);
                 switch(t) {
-                case 2: /* rar, cant split */
+                case 2: /* rar, can't split */
                         if(debug['P'])
                                 print("; %D rar; return 0\n", v2);
                         return 0;
 
                 case 3: /* set */
                         if(debug['P'])
                                 print("; %D set; return 1\n", v2);
                         return 1;
 
                 case 1: /* used, substitute */
@@ skipping 396 matching lines @@
                 }
                 if(a->index == t) {
                         if(f)
                                 a->index = s->type;
                         return 0;
                 }
                 return 0;
         }
         return 0;
 }