Simplify numbers regex (#1259)

## Checklist

- [ ] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [ ] I have updated the
[docs](https://github.com/cursorless-dev/cursorless/tree/main/docs) and
[cheatsheet](https://github.com/cursorless-dev/cursorless/tree/main/cursorless-talon/src/cheatsheet)
- [ ] I have not broken the cheatsheet

Author: pokey

src/libs/cursorless-engine/tokenizer/tokenizer.ts

@@ -42,7 +42,10 @@ const FIXED_TOKENS = [
 
 export const IDENTIFIER_WORD_REGEXES = ["\\p{L}", "\\p{M}", "\\p{N}"];
 const SINGLE_SYMBOLS_REGEX = "[^\\s\\w]";
-const NUMBERS_REGEX = "(?<=[^.\\d]|^)\\d+\\.\\d+(?=[^.\\d]|$)"; // (not-dot/digit digits dot digits not-dot/digit)
+// Accepts digits dot digits if not preceded or followed by a digit or dot. The
+// negative lookahed / lookbehind are to prevent matching numbers in semantic
+// versions (eg 1.2.3)
+const NUMBERS_REGEX = "(?<![.\\d])\\d+\\.\\d+(?![.\\d])";
 
 interface Matcher {
   tokenMatcher: RegExp;