Solaris portability fixes

tests/test-bisect

@@ -1,37 +1,37
 #!/bin/sh
 
 set -e
 
 HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
 echo "[extensions]" >> $HGTMP/.hgrc
 echo "hbisect=" >> $HGTMP/.hgrc
 
 echo % init
 hg init
 
 echo % committing changes
 count=0
 echo > a
 while test $count -lt 32 ; do
     echo 'a' >> a
     test $count -eq 0 && hg add
     hg ci -m "msg $count" -d "$count 0"
     echo % committed changeset $count
-    count=$(( $count + 1 ))
+    count=`expr $count + 1`
 done
 
 echo % log
 hg log
 
 echo % hg up -C
 hg up -C
 
 echo % bisect test
 hg bisect init
 hg bisect bad
 hg bisect good 1
 hg bisect good
 hg bisect good
 hg bisect good
 hg bisect bad
 hg bisect good

tests/test-extdiff

@@ -1,26 +1,30
 #!/bin/sh
 
 HGRCPATH=$HGTMP/.hgrc; export HGRCPATH
 echo "[extensions]" >> $HGTMP/.hgrc
 echo "extdiff=" >> $HGTMP/.hgrc
 
 hg init a
 cd a
 echo a > a
 hg add
-hg extdiff -o -Nr
+diff -N /dev/null /dev/null 2> /dev/null
+if [ $? -ne 0 ]; then
+	opt="-p gdiff"
+fi
+hg extdiff -o -Nr $opt
 
 echo "[extdiff]" >> $HGTMP/.hgrc
 echo "cmd.falabala=echo" >> $HGTMP/.hgrc
 echo "opts.falabala=diffing" >> $HGTMP/.hgrc
 
 hg falabala
 
 hg help falabala
 
 hg ci -d '0 0' -mtest1
 
 echo b >> a
 hg ci -d '1 0' -mtest2
 
 hg falabala -r 0:1 || echo "diff-like tools yield a non-zero exit code"