Index: exec.c
===================================================================
RCS file: /cvs/plan9/src/cmd/acme/exec.c,v
retrieving revision 1.20
diff -r1.20 exec.c
270c270
< 	if(expand(argt, argt->q0, argt->q1, &e)){
---
> 	if(expand(argt, argt->q0, argt->q1, &e, FALSE)){
Index: fns.h
===================================================================
RCS file: /cvs/plan9/src/cmd/acme/fns.h,v
retrieving revision 1.11
diff -r1.11 fns.h
89c89
< int	expand(Text*, uint, uint, Expand*);
---
> int	expand(Text*, uint, uint, Expand*, int);
Index: look.c
===================================================================
RCS file: /cvs/plan9/src/cmd/acme/look.c,v
retrieving revision 1.13
diff -r1.13 look.c
68c68
< 	expanded = expand(t, q0, q1, &e);
---
> 	expanded = expand(t, q0, q1, &e, TRUE);
612a613,617
> 
> // PAL: Two kinds of expansion, hence the testfilename flag: 
> // one is true expansion when q0==q1; the other is q0!=q1, which degenerates 
> // into a check for a filename without any expansion.  Button3 uses
> // this to check if the selected string is a filename.
614c619
< expand(Text *t, uint q0, uint q1, Expand *e)
---
> expand(Text *t, uint q0, uint q1, Expand *e, int testfilename)
627c632
< 	if(expandfile(t, q0, q1, e))
---
> 	if((testfilename || q0 == q1) && expandfile(t, q0, q1, e))