fix: add space between a numeral and following period

CHANGELOG.md

@@ -30,6 +30,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Escaping `\r` and `\f` in quoted string literals
 - `-- {` was not considered comment, even though it was not considered
   permutation block either
+- Add space between a numeral and following period when printing. For
+  example, `1 ..2` (string concatenation) should not be printed as
+  `1..2`, as LUA then parses the beginning of it as floating point
+  numeral `1.`
 
 ## [1.2.0] - 2023-04-02
 

pakettic/printer.py

@@ -11,7 +11,7 @@ def format(node: ast.Node, pretty: bool = False, no_load: bool = False) -> str:
     return Formatter(pretty=pretty, no_load=no_load).format(node)
 
 
-_hexy = re.compile('[0-9a-fxA-FXpP]').search
+_hexy = re.compile(r'[0-9a-fxA-FXpP\.]').search
 _alphaunder = re.compile('[_a-zA-Z]').search
 _alphanumunder = re.compile('[_a-zA-Z0-9]').search
 _single_quote_translation = str.maketrans({"\n": r"\n",
@@ -57,7 +57,7 @@ def __addspaces(self, tokens: typing.Iterable[str]):
                     # the previous token was word, and the next continues with a character that might be confused with it
                     yield ' '
                 elif type(prevtoken) is ast.Numeral and bool(_hexy(token[0])):
-                    yield ' '  # the previous token was numeral and the next starts with something that be confused with a hex
+                    yield ' '  # the previous token was numeral and the next starts with something that be confused with a hex or a decimal point
                 yield token
             elif type(token) is ast.Numeral:
                 strnumeral = str(token)

tests/test_printer.py

@@ -66,6 +66,7 @@ def test_printing_parsed_code(self):
             "x='\\r'",
             "x='\\t'",
             "x='\\f'",
+            "x=1 ..2",
         ]
         for a in cases:
             with self.subTest(code=a):