Fix a couple of tests due to implicit signed.

tests/run/c_int_types_T255.pyx

@@ -215,7 +215,7 @@ def test_add_sshort(x, y):
    >>> test_add_sshort(SSHORT_MIN, -1) #doctest: +ELLIPSIS
    Traceback (most recent call last):
        ...
-   OverflowError: value too large to convert to signed short
+   OverflowError: value too large to convert to short
    >>> test_add_sshort(SSHORT_MIN, 0) == SSHORT_MIN
    True
    >>> test_add_sshort(SSHORT_MIN, 1) == SSHORT_MIN+1
@@ -227,7 +227,7 @@ def test_add_sshort(x, y):
    >>> test_add_sshort(SSHORT_MAX, 1) #doctest: +ELLIPSIS
    Traceback (most recent call last):
        ...
-   OverflowError: value too large to convert to signed short
+   OverflowError: value too large to convert to short
    """
    cdef signed short r = x + y
    return r

tests/run/embedsignatures.pyx

@@ -123,19 +123,12 @@ __doc__ = ur"""
     >>> print(funcdoc(f_uc))
     f_uc(unsigned char c) -> unsigned char
 
-    >>> print(funcdoc(f_sc))
-    f_sc(signed char c) -> signed char
-
-
     >>> print(funcdoc(f_s))
     f_s(short s) -> short
 
     >>> print(funcdoc(f_us))
     f_us(unsigned short s) -> unsigned short
 
-    >>> print(funcdoc(f_ss))
-    f_ss(signed short s) -> signed short
-
 
     >>> print(funcdoc(f_i))
     f_i(int i) -> int
@@ -143,9 +136,6 @@ __doc__ = ur"""
     >>> print(funcdoc(f_ui))
     f_ui(unsigned int i) -> unsigned int
 
-    >>> print(funcdoc(f_si))
-    f_si(signed int i) -> signed int
-
     >>> print(funcdoc(f_bint))
     f_bint(bool i) -> bool
 
@@ -156,9 +146,6 @@ __doc__ = ur"""
     >>> print(funcdoc(f_ul))
     f_ul(unsigned long l) -> unsigned long
 
-    >>> print(funcdoc(f_sl))
-    f_sl(signed long l) -> signed long
-
 
     >>> print(funcdoc(f_L))
     f_L(long long L) -> long long
@@ -166,9 +153,6 @@ __doc__ = ur"""
     >>> print(funcdoc(f_uL))
     f_uL(unsigned long long L) -> unsigned long long
 
-    >>> print(funcdoc(f_sL))
-    f_sL(signed long long L) -> signed long long
-
 
     >>> print(funcdoc(f_f))
     f_f(float f) -> float
@@ -333,9 +317,6 @@ cpdef short f_s(short s):
 cpdef unsigned short f_us(unsigned short s):
     return s
 
-cpdef signed short f_ss(signed short s):
-    return s
-
 
 cpdef int f_i(int i):
     return i
@@ -343,9 +324,6 @@ cpdef int f_i(int i):
 cpdef unsigned int f_ui(unsigned int i):
     return i
 
-cpdef signed int f_si(signed int i):
-    return i
-
 cpdef bint f_bint(bint i):
     return i
 
@@ -356,9 +334,6 @@ cpdef long f_l(long l):
 cpdef unsigned long f_ul(unsigned long l):
     return l
 
-cpdef signed long f_sl(signed long l):
-    return l
-
 
 cpdef long long f_L(long long L):
     return L
@@ -366,9 +341,6 @@ cpdef long long f_L(long long L):
 cpdef unsigned long long f_uL(unsigned long long L):
     return L
 
-cpdef signed long long f_sL(signed long long L):
-    return L
-
 
 cpdef float f_f(float f):
     return f