230513.010919.CST update checktest and TODO

fortran/tests/checktest

@@ -43,7 +43,7 @@ ERRORS="$(grep -i "error\|fail\|violation\|exception\|invalid\|bad\|overflow\|se
     | grep -vi "BAD_TRSTEP" \
     | grep -vi "moderr\|errorid\|errormsg\|errstop" \
     | grep -vi "berr\|erres" \
-    | grep -vi "constraint\ violation" \
+    | grep -vi "aint\ violation" \
     | grep -vi "Warning: TRSTEP: Assertion failed: D is initialized." \
 	| grep -vi "Warning: UOBYQA: Invalid\|Warning: NEWUOA: Invalid\|Warning: BOBYQA: Invalid\|Warning: LINCOA: Invalid\|Warning: COBYLA: Invalid" \
     | grep -vi "maybe due to overflow, or the input is not an integer" \

todo/TODO

@@ -46,3 +46,10 @@ predicted reduction by the model for the step that leads to the corresponding fu
 ghist: an array of size N-by-NF, each column being the model gradient at the trust region center
 when the corresponding function evaluation is invoked
 jachist (only for COBYLA): similar to ghist, but for the Jacobian matrix of the nonlinear constraints.
+N.B.: Similar to fhist, we always output statehist, radhist, and rathist, since they are 1D arrays.
+In addition, we may use statehist and radhist to improve fmsg, invoking it uniformly by
+```
+    call fmsg(solver, statehist(nf), iprint, nf, radhist(nf), f, x, [optional inputs])
+```
+To this end, we will need to modify fmsg so that it can translate the state index (0, 1, 2, 3) to
+the state name as mentioned above.