sagemathgh-38450: fix annotations in sage/matrix/matrix2.pyx and `s…

…age/rings/integer.pyx`

    
Fix some annotations issues reported by some CI.


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- [x] The description explains in detail what this PR is about.
- [ ] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation and checked the documentation
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### ⌛ Dependencies

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URL: sagemath#38450
Reported by: David Coudert
Reviewer(s): Kwankyu Lee

src/sage/matrix/matrix2.pyx

@@ -10548,7 +10548,6 @@ cdef class Matrix(Matrix1):
             [                   0                    0   5.444401659866974?   5.468660610611130? -0.6827161852283857?]
             [                   0                    0                    0   1.027626039419836?  -3.619300149686620?]
             [                   0                    0                    0                    0   0.024551430807012?]
-
             sage: Q.conjugate_transpose()*Q
             [1.000000000000000?            0.?e-18            0.?e-17            0.?e-16            0.?e-13]
             [           0.?e-18 1.000000000000000?            0.?e-17            0.?e-16            0.?e-13]
@@ -10583,7 +10582,6 @@ cdef class Matrix(Matrix1):
             [           0.?e-18 + 0.?e-17*I 1.000000000000000? + 0.?e-17*I            0.?e-17 + 0.?e-17*I            0.?e-16 + 0.?e-16*I]
             [           0.?e-17 + 0.?e-17*I            0.?e-17 + 0.?e-17*I 1.000000000000000? + 0.?e-17*I            0.?e-16 + 0.?e-16*I]
             [           0.?e-16 + 0.?e-16*I            0.?e-16 + 0.?e-16*I            0.?e-16 + 0.?e-16*I 1.000000000000000? + 0.?e-16*I]
-
             sage: Q*R - A
             [            0.?e-17 0.?e-17 + 0.?e-17*I 0.?e-16 + 0.?e-16*I 0.?e-16 + 0.?e-16*I]
             [            0.?e-18 0.?e-17 + 0.?e-17*I 0.?e-16 + 0.?e-16*I 0.?e-16 + 0.?e-16*I]

src/sage/rings/integer.pyx

@@ -592,12 +592,13 @@ cdef class Integer(sage.structure.element.EuclideanDomainElement):
 
         Test comparisons with numpy types (see :issue:`13386` and :issue:`18076`)::
 
-            sage: import numpy                                                          # needs numpy
-            sage: if int(numpy.version.short_version[0]) > 1:                           # needs numpy
-            ....:     numpy.set_printoptions(legacy="1.25")                             # needs numpy
-            sage: numpy.int8('12') == 12                                                # needs numpy
+            sage: # needs numpy
+            sage: import numpy
+            sage: if int(numpy.version.short_version[0]) > 1:
+            ....:     numpy.set_printoptions(legacy="1.25")
+            sage: numpy.int8('12') == 12
             True
-            sage: 12 == numpy.int8('12')                                                # needs numpy
+            sage: 12 == numpy.int8('12')
             True
 
             sage: float('15') == 15