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libbacktrace: remove extra characters in README.md
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@@ -14,7 +14,7 @@ occurs or to gather detailed profiling information.
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In general the functions provided by this library are async-signal-safe,
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meaning that they may be safely called from a signal handler.
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That said, on systems that use `dl_iterate_phdr`, such as GNU/Linux,
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gitthe first call to a libbacktrace function will call `dl_iterate_phdr`,
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the first call to a libbacktrace function will call `dl_iterate_phdr`,
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which is not in general async-signal-safe. Therefore, programs
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that call libbacktrace from a signal handler should ensure that they
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make an initial call from outside of a signal handler.
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