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Merge #17751: doc: use recommended shebang approach in documentation code block 

6094222de7 use preferred shebang approach for documentation (hackerrdave)

Pull request description:

  Documentation update to use recommended shebang approach mentioned in the [developer notes](https://github.com/bitcoin/bitcoin/blob/master/doc/developer-notes.md#shebang)

ACKs for top commit:
  hebasto:
    ACK 6094222de7, I have reviewed the code, and it looks OK, I agree it can be merged.

Tree-SHA512: fc58632f0a6fa82c7abdddfac4897f082110d647426d2b468cba6fabf6b34a015fcad47e5b26be98e629b8b0417b8781e8d89da67189e20da228b97b17f1a532
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MarcoFalke 2019-12-21 02:13:17 +07:00
parent 6677be64f6 6094222de7
commit 0cda557340
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doc/reduce-memory.md
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@ -41,7 +41,7 @@ threads take up 8MiB for the thread stack on a 64-bit system, and 4MiB in a
By default, since glibc `2.10`, the C library will create up to two heap arenas per core. This is known to cause excessive memory usage in some scenarios. To avoid this make a script that sets `MALLOC_ARENA_MAX` before starting bitcoind:
```bash
#!/bin/bash
#!/usr/bin/env bash
export MALLOC_ARENA_MAX=1
bitcoind
```