Avoid failure in debugger when printing Ltac names.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16152 85f007b7-540e-0410-9357-904b9bb8a0f7
Slightly improving some debugging printing and error message for modules.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16153 85f007b7-540e-0410-9357-904b9bb8a0f7
Fixed bug #2967 (some missing check on ill-formed recursive notation strings).

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16155 85f007b7-540e-0410-9357-904b9bb8a0f7
Improving formatting of output of "Test table".

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16159 85f007b7-540e-0410-9357-904b9bb8a0f7
Ordered evars by level of dependency in the merging phase of unification
so as to get instances of evars closer from what the user sees.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16160 85f007b7-540e-0410-9357-904b9bb8a0f7