Solaris compatibility fixes for test-keyword:

- do not use /bin/false (yields 255 instead of 1)
- do not use "cd -", simply use "cd .." instead.

tests/test-keyword

@@ -44,7 +44,7 b' hg status'
 
 echo % default keyword expansion including commit hook
 echo % interrupted commit should not change state or run commit hook
-HGEDITOR=false hg --debug commit
+hg --debug commit
 echo % status
 hg status
 
@@ -131,7 +131,7 b' secondline'
 EOF
 
 echo % interrupted commit should not change state
-HGEDITOR=false hg commit
+hg commit
 echo % status
 hg status
 
@@ -207,7 +207,7 b' echo % kwshrink a inside directory x'
 hg --verbose kwshrink a
 echo % cat a
 cat a
-cd - > /dev/null 2>&1
+cd ..
 
 echo % kwexpand nonexistent
 hg kwexpand nonexistent

tests/test-keyword.out

@@ -103,7 +103,7 b' b'
 sym
 transaction abort!
 rollback completed
-abort: edit failed: false exited with status 1
+abort: empty commit message
 % status
 A a
 A b
@@ -207,7 +207,7 b' a'
 % interrupted commit should not change state
 transaction abort!
 rollback completed
-abort: edit failed: false exited with status 1
+abort: empty commit message
 % status
 M a
 ? log