INSTALL.md: Add 'install' to apt command examples.
@ -25,7 +25,7 @@ sudo apt-get install autoconf libtool libprotobuf-c-dev libsqlite3-dev libgmp-de
For development or running tests, get additional dependencies:
```
sudo apt-get asciidoc valgrind pip3 && pip3 install python-bitcoinlib
sudo apt-get install asciidoc valgrind pip3 && pip3 install python-bitcoinlib
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