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Author SHA1 Message Date
John MacFarlane
dca0032b0e LaTeX reader: allow macro definitions inside macros.
Previously we went into an infinite loop with

```
\newcommand{\noop}[1]{#1}
\noop{\newcommand{\foo}[1]{#1}}
\foo{hi}
```

See #4253.
2018-01-13 12:22:25 -08:00