fix three syntax errors in doc elsewhere

Author: fchapoton

src/sage/modules/torsion_quadratic_module.py

@@ -228,9 +228,9 @@ class TorsionQuadraticModule(FGP_Module_class, CachedRepresentation):
     @staticmethod
     def __classcall__(cls, V, W, gens=None, modulus=None, modulus_qf=None, check=True):
         r"""
-        Return a :class:``TorsionQuadraticModule``.
+        Return a :class:`TorsionQuadraticModule`.
 
-        This method does the preprocessing for :meth:``sage.structure.CachedRepresentation``.
+        This method does the preprocessing for :meth:`sage.structure.CachedRepresentation`.
 
         TESTS::
 

src/sage/quadratic_forms/quadratic_form.py

@@ -5,7 +5,7 @@
 
 - Jon Hanke (2007-06-19)
 - Anna Haensch (2010-07-01): Formatting and ReSTification
-- Simon Brandhorst (2019-10-15): :meth:``quadratic_form_from_invariants``
+- Simon Brandhorst (2019-10-15): :meth:`quadratic_form_from_invariants`
 """
 
 # ****************************************************************************