forq: fix bib entry and bind the doxygen doc to a group

* doc/spot.bib: Reformat the FORQ reference in the style of the
rest of the bibliographic file.
* spot/twaalgos/forq_contains.hh: Adjust, and add missing \ingroup.

doc/spot.bib

@@ -1,3 +1,4 @@
+
 @InProceedings{	  babiak.12.tacas,
   author	= {Tom{\'a}{\v{s}} Babiak and Mojm{\'i}r
 		  K{\v{r}}et{\'i}nsk{\'y} and Vojt{\v{e}}ch {\v{R}}eh{\'a}k
@@ -185,7 +186,7 @@
   month		= apr,
   volume	= {13244},
   pages		= {99--117},
-  doi		= {10.1007/978-3-030-99527-0_6},
+  doi		= {10.1007/978-3-030-99527-0_6}
 }
 
 @InProceedings{	  cerna.03.mfcs,
@@ -336,17 +337,17 @@
   month		= aug
 }
 
-@inproceedings{doveriFORQBasedLanguageInclusion2022,
-  title = {{{FORQ-Based Language Inclusion Formal Testing}}},
-  booktitle = {{{CAV}}'22: {{Proc}}. 32nd {{Int}}. {{Conf}}. on {{Computer Aided Verification}}},
-  author = {Doveri, Kyveli and Ganty, Pierre and Mazzocchi, Nicolas},
-  year = {2022},
-  volume = {13372},
-  pages = {109--129},
-  publisher = {{Springer International Publishing}},
-  doi = {10.1007/978-3-031-13188-2_6},
-  urldate = {2022-09-15},
-  isbn = {978-3-031-13187-5 978-3-031-13188-2}
+@InProceedings{	  doveri.22.cav,
+  title		= {{FORQ}-Based Language Inclusion Formal Testing},
+  booktitle	= {Proceedings of the 32nd International Conference on
+		  Computer Aided Verification (CAV'22)},
+  author	= {Kyveli Doveri and Pierre Ganty and Nicolas Mazzocchi},
+  year		= {2022},
+  volume	= {13372},
+  pages		= {109--129},
+  publisher	= {Springer International Publishing},
+  doi		= {10.1007/978-3-031-13188-2_6},
+  month		= aug
 }
 
 @InProceedings{	  duret.11.vecos,
@@ -1099,7 +1100,8 @@
   publisher	= {Elsevier},
   editor	= {Rance Cleaveland and Hubert Garavel},
   year		= {2002},
-  month		= jul,  pdf		= {adl/duret.16.atva.pdf},
+  month		= jul,
+  pdf		= {adl/duret.16.atva.pdf},
   abstract	= {Checking liveness properties with partial-order reductions
 		  requires a cycle proviso to ensure that an action cannot be
 		  postponed forever. The proviso forces each cycle to contain
@@ -1111,7 +1113,6 @@
 		  the source of this edge, while this paper also explores the
 		  expansion of the destination and the use of SCC-based
 		  information.},
-
   address	= {M{\'a}laga, Spain},
   doi		= {10.1016/S1571-0661(04)80409-2}
 }