fix: don't add spacing between consencutive braces in string [closes s…

…nakemake#220]

snakefmt/parser/syntax.py

@@ -72,6 +72,8 @@ def operator_skip_spacing(prev_token: Token, token: Token) -> bool:
         return True
     elif prev_token.type == tokenize.STRING and token.string == ",":
         return True
+    elif prev_token.string == "}" and token.string == "{":  # issue #220
+        return True
     else:
         return False
 

tests/test_formatter.py

@@ -861,9 +861,6 @@ def test_f_string_with_double_braces_in_input(self):
 
     def test_f_string_with_double_braces_in_python_code(self):
         """https://github.com/snakemake/snakefmt/issues/215"""
-        """def get_test_regions(wildcards):
-    benchmark = config["variant-calls"][wildcards.callset]["benchmark"]
-    return f"resources/regions/{benchmark}/test-regions.cov-{{cov}}.bed"""
         snakecode = (
             "def get_test_regions(wildcards):\n"
             f'{TAB * 1}benchmark = config["variant-calls"][wildcards.callset]["benchmark"]\n'  # noqa: E501
@@ -872,6 +869,12 @@ def test_f_string_with_double_braces_in_python_code(self):
         formatter = setup_formatter(snakecode)
         assert formatter.get_formatted() == snakecode
 
+    def test_f_string_spacing_of_consecutive_braces(self):
+        """https://github.com/snakemake/snakefmt/issues/222"""
+        snakecode = 'f"{var1}{var2}"\n'
+        formatter = setup_formatter(snakecode)
+        assert formatter.get_formatted() == snakecode
+
 
 class TestReformatting_SMK_BREAK:
     """