errors: rewrite the logic how errors are reported

Instead of the dependency oriented logic, switch to print them
for each package or name needed. Might give a bit more readable
errors now. There's still few corner cases that proper error is
not output, which are cought by the test cases.

1 files changed, 1 insertions, 1 deletions

diff --git a/test/error5.test b/test/error5.test
index b424454..9aa1818 100644
--- a/test/error5.test
+++ b/test/error5.test
@@ -2,5 +2,5 @@
 --test-repo complicated1.repo
 add a>2
 @EXPECT
-ERROR: unsatisfiable dependencies:
+ERROR: unsatisfiable constraints:
   b-1: d<2.0