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Clarify snippet placeholder structure #2032

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Clarify snippet placeholder structure #2032

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2 changes: 1 addition & 1 deletion _specifications/lsp/3.18/language/completion.md
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Expand Up @@ -934,7 +934,7 @@ ${TM_FILENAME/(.*)\..+$/$1/}
Below is the grammar for snippets in EBNF ([extended Backus-Naur form, XML variant](https://www.w3.org/TR/xml/#sec-notation)). With `\` (backslash), you can escape `$`, `}` and `\`. Within choice elements, the backslash also escapes comma and pipe characters. Only the characters required to be escaped can be escaped, so `$` should not be escaped within these constructs and neither `$` nor `}` should be escaped inside choice constructs.

```
any ::= tabstop | placeholder | choice | variable | text
any ::= (tabstop | placeholder | choice | variable | text)+
tabstop ::= '$' int | '${' int '}'
placeholder ::= '${' int ':' any '}'
choice ::= '${' int '|' choicetext (',' choicetext)* '|}'
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