kirill-stepanishin opened a new pull request, #3558:
URL: https://github.com/apache/tinkerpop/pull/3558

   https://issues.apache.org/jira/browse/TINKERPOP-3151
   
   Makes the leading digit optional in float literals, so forms like `.5`, 
`.5f`, and `.5m` parse, aligning the Gremlin grammar with Groovy.
   
   **Changes**:
   
   - Grammar: added a `DecimalFloatingPointLiteral` alternative for the 
leading-dot form. Added a `RANGE` : `'..'` token so `1..5` still tokenizes 
correctly (otherwise `..` gets swallowed into a `.5` float), and pointed 
`genericLiteralRange` at it, with a matching index fix in 
`GenericLiteralVisitor`.
   - Tests: added `ValidFloatLiteralTest` cases and Gherkin scenarios 
`g_injectXpoint5X/fX/dX`, plus `g_injectX1to5X` to cover the new `RANGE` token. 
Regenerated the Python/JS/Go/.NET GLV feature files.
   - .NET: ignored `g_injectXpoint5fX` because the .NET translator emits a bare 
`0.5`, dropping the float type on round-trip (a pre-existing limitation only 
.NET's strict typing surfaces, not fixing it here).


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