Wording tweaks

Co-authored-by: Elena Peña Tapia <[email protected]>
Co-authored-by: Luciano Bello <[email protected]>

qiskit/circuit/parameterexpression.py

@@ -507,7 +507,7 @@ def numeric(self) -> int | float | complex:
         when they are involved.  If you want to assert that all floating-point calculations *were*
         carried out at infinite precision (i.e. :class:`float` could represent every intermediate
         value exactly), you can use :meth:`float.is_integer` to check if the return float represents
-        and integer and cast it using :class:`int` if so.  This would be an unusual pattern;
+        an integer and cast it using :class:`int` if so.  This would be an unusual pattern;
         typically one requires this by only ever using explicitly :class:`~numbers.Rational` objects
         while working with symbolic expressions.
 
@@ -524,7 +524,7 @@ def numeric(self) -> int | float | complex:
         """
         if self._parameter_symbols:
             raise TypeError(
-                f"expression with unbound parameters '{self.parameters}' is not numeric"
+                f"Expression with unbound parameters '{self.parameters}' is not numeric"
             )
         if self._symbol_expr.is_integer:
             # Integer evaluation is reliable, as far as we know.

qiskit/circuit/quantumcircuit.py

@@ -3124,7 +3124,7 @@ def map_calibration(qubits, parameters, schedule):
                 if not parameter.parameters:
                     parameter = parameter.numeric()
                     if isinstance(parameter, complex):
-                        raise TypeError(f"calibration cannot use complex number: '{parameter}'")
+                        raise TypeError(f"Calibration cannot use complex number: '{parameter}'")
                 new_parameters[i] = parameter
                 modified = True
             if modified:

qiskit/transpiler/passes/basis/basis_translator.py

@@ -339,7 +339,7 @@ def _replace_node(self, dag, node, instr_map):
                 if not new_phase.parameters:
                     new_phase = new_phase.numeric()
                     if isinstance(new_phase, complex):
-                        raise TranspilerError(f"global phase must be real, but got '{new_phase}'")
+                        raise TranspilerError(f"Global phase must be real, but got '{new_phase}'")
                 bound_target_dag.global_phase = new_phase
         else:
             bound_target_dag = target_dag