tests: handle .t files without trailing LF

9a2de8dae27b made this simple test-test.t succeed silently:
  $ printf '  $ true' > test-test.t
but did not give a usable .err in this case:
  $ printf '  $ false' > test-test.t

The missing LF will now be fixed in the test output and it will thus give a
test failure and a solution in the .err file.

tests/run-tests.py

@@ -464,6 +464,8 b' def tsttest(test, options, replacements)'
     after = {}
     expected = {}
     for n, l in enumerate(t):
+        if not l.endswith('\n'):
+            l += '\n'
         if l.startswith('  $ '): # commands
             after.setdefault(pos, []).append(l)
             prepos = pos
@@ -480,8 +482,6 b' def tsttest(test, options, replacements)'
             # non-command/result - queue up for merged output
             after.setdefault(pos, []).append(l)
 
-    if script and not script[-1].endswith('\n'):
-        script[-1] = script[-1] + '\n'
     script.append('echo %s %s $?\n' % (salt, n + 1))
 
     fd, name = tempfile.mkstemp(suffix='hg-tst')

tests/test-qrecord.t

@@ -302,5 +302,3 b" After qrecord b.patch 'tip'"
 After qrecord b.patch 'diff'
 
   $ hg diff --nodates
-
-End
  No newline at end of file