Latest upstream autosetup. Fixes two minor corner-case issues which we haven't yet seen in practice.

Author: sgbeal

autosetup/autosetup

@@ -1634,8 +1634,8 @@ proc automf_command_reference {} {
 
             if {[regexp {^#.*@section (.*)$} $line -> section]} {
                 lappend doc($current) [list section $section]
-				continue
-			}
+                continue
+            }
 
             # Find embedded module names
             if {[regexp {^#.*@module ([^ ]*)} $line -> modulename]} {
@@ -1651,7 +1651,7 @@ proc automf_command_reference {} {
             if {$cmd eq "synopsis:"} {
                 set current $modulename
                 lappend doc($current) [list section "Module: $modulename"]
-			} else {
+            } else {
                 lappend doc($current) [list subsection $cmd]
             }
 
@@ -2088,8 +2088,12 @@ if {$autosetup(iswin)} {
 	proc split-path {} {
 		split [getenv PATH .] :
 	}
+	# Check for an executable file
 	proc file-isexec {exec} {
-		file executable $exec
+		if {[file executable $exec] && [file isfile $exec]} {
+			return 1
+		}
+		return 0
 	}
 }
 

autosetup/autosetup-find-tclsh

@@ -9,7 +9,7 @@ for tclsh in ./jimsh0 $autosetup_tclsh jimsh tclsh tclsh8.5 tclsh8.6 tclsh8.7; d
 done
 echo 1>&2 "No installed jimsh or tclsh, building local bootstrap jimsh0"
 for cc in ${CC_FOR_BUILD:-cc} gcc; do
-	{ $cc -o jimsh0 "$d/jimsh0.c"; } >/dev/null 2>&1 || continue
+	{ $cc -o jimsh0 "$d/jimsh0.c"; } 2>/dev/null >/dev/null || continue
 	./jimsh0 "$d/${1-autosetup-test-tclsh}" && exit 0
 done
 echo 1>&2 "No working C compiler found. Tried ${CC_FOR_BUILD:-cc} and gcc."