Shift issue numbering in function names like test_bug123

(see #7235)

fixes #8286

sympy/core/tests/test_equal.py

@@ -63,7 +63,7 @@ class T(object):
     assert (Symbol != t)
 
 
-def test_cmp_bug1258():
+def test_cmp_issue_4357():
     """ Check that Basic subclasses can be compared with sympifiable objects.
 
     https://github.com/sympy/sympy/issues/4357

sympy/core/tests/test_sympify.py

@@ -225,7 +225,7 @@ def test_sage():
     assert hasattr(log(x), "_sage_")
 
 
-def test_bug496():
+def test_issue_3595():
     assert sympify("a_") == Symbol("a_")
     assert sympify("_a") == Symbol("_a")
 

sympy/series/tests/test_limits.py

@@ -209,10 +209,6 @@ def test_doit2():
     assert l.doit(deep=False) == l
 
 
-def test_bug693a():
-    assert sin(sin(x + 1) + 1).limit(x, 0) == sin(sin(1) + 1)
-
-
 def test_issue_3792():
     assert limit( (1 - cos(x))/x**2, x, S(1)/2) == 4 - 4*cos(S(1)/2)
     assert limit(sin(sin(x + 1) + 1), x, 0) == sin(1 + sin(1))