add python3.7 output variant

test-data/unit/semanal-errors.test

@@ -362,81 +362,107 @@ main:2: error: "yield" outside function
 1 = 1
 [out]
 main:1: error: cannot assign to literal
+[out version==3.7]
+main:1: error: can't assign to literal
 [out version>=3.10]
 main:1: error: cannot assign to literal here. Maybe you meant '==' instead of '='?
 
 [case testInvalidLvalues2]
 (1) = 1
 [out]
 main:1: error: cannot assign to literal
+[out version==3.7]
+main:1: error: can't assign to literal
 [out version>=3.10]
 main:1: error: cannot assign to literal here. Maybe you meant '==' instead of '='?
 
 [case testInvalidLvalues3]
 (1, 1) = 1
 [out]
 main:1: error: cannot assign to literal
+[out version==3.7]
+main:1: error: can't assign to literal
 
 [case testInvalidLvalues4]
 [1, 1] = 1
 [out]
 main:1: error: cannot assign to literal
+[out version==3.7]
+main:1: error: can't assign to literal
 
 [case testInvalidLvalues6]
 x = y = z = 1  # ok
 x, (y, 1) = 1
 [out]
 main:2: error: cannot assign to literal
+[out version==3.7]
+main:2: error: can't assign to literal
 
 [case testInvalidLvalues7]
 x, [y, 1] = 1
 [out]
 main:1: error: cannot assign to literal
+[out version==3.7]
+main:1: error: can't assign to literal
 
 [case testInvalidLvalues8]
 x, [y, [z, 1]] = 1
 [out]
 main:1: error: cannot assign to literal
+[out version==3.7]
+main:1: error: can't assign to literal
 
 [case testInvalidLvalues9]
 x, (y) = 1 # ok
 x, (y, (z, z)) = 1 # ok
 x, (y, (z, 1)) = 1
 [out]
 main:3: error: cannot assign to literal
+[out version==3.7]
+main:3: error: can't assign to literal
 
 [case testInvalidLvalues10]
 x + x = 1
 [out]
 main:1: error: cannot assign to operator
+[out version==3.7]
+main:1: error: can't assign to operator
 [out version>=3.10]
 main:1: error: cannot assign to expression here. Maybe you meant '==' instead of '='?
 
 [case testInvalidLvalues11]
 -x = 1
 [out]
 main:1: error: cannot assign to operator
+[out version==3.7]
+main:1: error: can't assign to operator
 [out version>=3.10]
 main:1: error: cannot assign to expression here. Maybe you meant '==' instead of '='?
 
 [case testInvalidLvalues12]
 1.1 = 1
 [out]
 main:1: error: cannot assign to literal
+[out version==3.7]
+main:1: error: can't assign to literal
 [out version>=3.10]
 main:1: error: cannot assign to literal here. Maybe you meant '==' instead of '='?
 
 [case testInvalidLvalues13]
 'x' = 1
 [out]
 main:1: error: cannot assign to literal
+[out version==3.7]
+main:1: error: can't assign to literal
 [out version>=3.10]
 main:1: error: cannot assign to literal here. Maybe you meant '==' instead of '='?
 
 [case testInvalidLvalues14]
 x() = 1
 [out]
 main:1: error: cannot assign to function call
+[out version==3.7]
+main:1: error: can't assign to function call
 [out version>=3.10]
 main:1: error: cannot assign to function call here. Maybe you meant '==' instead of '='?
 
@@ -898,6 +924,8 @@ def f(): pass
 f() = 1 # type: int
 [out]
 main:3: error: cannot assign to function call
+[out version==3.7]
+main:3: error: can't assign to function call
 [out version>=3.10]
 main:3: error: cannot assign to function call here. Maybe you meant '==' instead of '='?
 
@@ -976,6 +1004,8 @@ a = 1
 a() = None # type: int
 [out]
 main:2: error: cannot assign to function call
+[out version==3.7]
+main:2: error: can't assign to function call
 [out version>=3.10]
 main:2: error: cannot assign to function call here. Maybe you meant '==' instead of '='?
 
@@ -1291,6 +1321,8 @@ def f() -> None:
     f() = 1  # type: int
 [out]
 main:3: error: cannot assign to function call
+[out version==3.7]
+main:3: error: can't assign to function call
 [out version>=3.10]
 main:3: error: cannot assign to function call here. Maybe you meant '==' instead of '='?
 

test-data/unit/semanal-statements.test

@@ -558,6 +558,8 @@ def f(x, y) -> None:
     del x, y + 1
 [out]
 main:2: error: cannot delete operator
+[out version==3.7]
+main:2: error: can't delete operator
 [out version>=3.10]
 main:2: error: cannot delete expression