Fix email autolink rendering in latex. #418

Job	Run time
linter	50s
windows (static)	50s
windows (shared)	1m 18s
posix (linux, gcc, shared, ASan)	24s
posix (linux, clang, static, ASan)	23s
posix (linux, gcc, shared)	14s
posix (linux, clang, shared, ASan)	31s
posix (macos, clang, static, ASan)	55s
posix (macos, clang, static)	16s
posix (linux, gcc, static, ASan)	49s
posix (linux, clang, static)	27s
posix (linux, clang, shared)	18s
posix (macos, clang, shared)	42s
posix (linux, gcc, static)	16s
	8m 13s

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