context: name files relative to cwd in warning messages I was several directories deep in the kernel tree, ran `hg add`, and got the warning about the size of one of the files. I noticed that it suggested undoing the add with a specific revert command. The problem is, it would have failed since the path printed was relative to the repo root instead of cwd. While here, I just fixed the other messages too. As an added benefit, these messages now look the same as the verbose/inexact messages for the corresponding command. I don't think most of these messages are reachable (typically the corresponding cmdutil function does the check). I wasn't able to figure out why the keyword tests were failing when using pathto()- I couldn't cause an absolute path to be used by manipulating the --cwd flag on a regular add. (I did notice that keyword is adding the file without holding wlock.)

--- a/tests/test-add.t	Sat Jul 15 00:52:36 2017 -0400
+++ b/tests/test-add.t	Tue Jul 11 00:40:29 2017 -0400
@@ -14,6 +14,11 @@
   adding a
   $ hg st
   A a
+  $ mkdir dir
+  $ cd dir
+  $ hg add ../a
+  ../a already tracked!
+  $ cd ..
 
   $ echo b > b
   $ hg add -n b