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spacing - How does xparse's routine for looking for an optional argument do the trick of preserving space-tokens in case no optional argument is present? - TeX - LaTeX Stack Exchange
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macros - Bugs in conditional structure in a newcommand definition with optional arguments - TeX - LaTeX Stack Exchange
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Autocompletion of locally defined commands assumes wrong number of arguments · Issue #1322 · SublimeText/LaTeXTools · GitHub
![macros - naming argument and optional-argument for \def, \newcommand and newenvironment - TeX - LaTeX Stack Exchange macros - naming argument and optional-argument for \def, \newcommand and newenvironment - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/oA6aL.png)
macros - naming argument and optional-argument for \def, \newcommand and newenvironment - TeX - LaTeX Stack Exchange
![macros - naming argument and optional-argument for \def, \newcommand and newenvironment - TeX - LaTeX Stack Exchange macros - naming argument and optional-argument for \def, \newcommand and newenvironment - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/N89Gd.png)