Merge #21075: doc: Fix markdown formatting

e1604b3d50dca3291a432be59cfd03c0e846e7b2 doc: Replace tabs for spaces (Gunar C. Gessner)
98db48d3490e5863b4d89e03cebeece9bd1f91ae doc: Fix markdown formatting (Gunar Gessner)

Pull request description:

  Lines were being joined making it hard to read.

ACKs for top commit:
  RandyMcMillan:
    ACK e1604b3d50dca3291a432be59cfd03c0e846e7b2

Tree-SHA512: fd5a7c5e9a1cbbf0fbb13b5c30b87853c84751da7f0fad08151bda07f1933872ab51cad29a0c0a70ced48e60df6d83bff3f84c2f77d00d22723fae9a8c3534fc

3 files changed, 83 insertions, 82 deletions

diff --git a/doc/build-unix.md b/doc/build-unix.md
index 5c24886dbf..4051440886 100644
--- a/doc/build-unix.md
+++ b/doc/build-unix.md
@@ -9,7 +9,7 @@ Note
 Always use absolute paths to configure and compile Bitcoin Core and the dependencies.
 For example, when specifying the path of the dependency:
 
-	../dist/configure --enable-cxx --disable-shared --with-pic --prefix=$BDB_PREFIX
+    ../dist/configure --enable-cxx --disable-shared --with-pic --prefix=$BDB_PREFIX
 
 Here BDB_PREFIX must be an absolute path - it is defined using $(pwd) which ensures
 the usage of the absolute path.
@@ -166,9 +166,9 @@ miniupnpc
 https://miniupnp.tuxfamily.org/files/).  UPnP support is compiled in and
 turned off by default.  See the configure options for UPnP behavior desired:
 
-	--without-miniupnpc      No UPnP support, miniupnp not required
-	--disable-upnp-default   (the default) UPnP support turned off by default at runtime
-	--enable-upnp-default    UPnP support turned on by default at runtime
+    --without-miniupnpc      No UPnP support, miniupnp not required
+    --disable-upnp-default   (the default) UPnP support turned off by default at runtime
+    --enable-upnp-default    UPnP support turned on by default at runtime
 
 libnatpmp
 ---------
@@ -177,9 +177,9 @@ libnatpmp
 from [here](https://miniupnp.tuxfamily.org/files/). NAT-PMP support is compiled in and
 turned off by default. See the configure options for NAT-PMP behavior desired:
 
-	--without-natpmp          No NAT-PMP support, libnatpmp not required
-	--disable-natpmp-default  (the default) NAT-PMP support turned off by default at runtime
-	--enable-natpmp-default   NAT-PMP support turned on by default at runtime
+    --without-natpmp          No NAT-PMP support, libnatpmp not required
+    --disable-natpmp-default  (the default) NAT-PMP support turned off by default at runtime
+    --enable-natpmp-default   NAT-PMP support turned on by default at runtime
 
 Berkeley DB
 -----------
@@ -199,9 +199,9 @@ Boost
 -----
 If you need to build Boost yourself:
 
-	sudo su
-	./bootstrap.sh
-	./bjam install
+    sudo su
+    ./bootstrap.sh
+    ./bjam install
 
 
 Security
@@ -212,8 +212,8 @@ This can be disabled with:
 
 Hardening Flags:
 
-	./configure --enable-hardening
-	./configure --disable-hardening
+    ./configure --enable-hardening
+    ./configure --disable-hardening
 
 
 Hardening enables the following features:
@@ -228,7 +228,7 @@ Hardening enables the following features:
 
     To test that you have built PIE executable, install scanelf, part of paxutils, and use:
 
-    	scanelf -e ./bitcoin
+        scanelf -e ./bitcoin
 
     The output should contain:
 
@@ -245,8 +245,8 @@ Hardening enables the following features:
     `scanelf -e ./bitcoin`
 
     The output should contain:
-	STK/REL/PTL
-	RW- R-- RW-
+    STK/REL/PTL
+    RW- R-- RW-
 
     The STK RW- means that the stack is readable and writeable but not executable.
 
diff --git a/doc/init.md b/doc/init.md
index 99aa0a0def..399b819bf4 100644
--- a/doc/init.md
+++ b/doc/init.md
@@ -53,11 +53,12 @@ Paths
 
 All three configurations assume several paths that might need to be adjusted.
 
-Binary:              `/usr/bin/bitcoind`
-Configuration file:  `/etc/bitcoin/bitcoin.conf`
-Data directory:      `/var/lib/bitcoind`
-PID file:            `/var/run/bitcoind/bitcoind.pid` (OpenRC and Upstart) or `/run/bitcoind/bitcoind.pid` (systemd)
-Lock file:           `/var/lock/subsys/bitcoind` (CentOS)
+    Binary:              /usr/bin/bitcoind
+    Configuration file:  /etc/bitcoin/bitcoin.conf
+    Data directory:      /var/lib/bitcoind
+    PID file:            /var/run/bitcoind/bitcoind.pid (OpenRC and Upstart) or
+                         /run/bitcoind/bitcoind.pid (systemd)
+    Lock file:           /var/lock/subsys/bitcoind (CentOS)
 
 The PID directory (if applicable) and data directory should both be owned by the
 bitcoin user and group. It is advised for security reasons to make the
@@ -83,10 +84,10 @@ OpenRC).
 
 ### macOS
 
-Binary:              `/usr/local/bin/bitcoind`
-Configuration file:  `~/Library/Application Support/Bitcoin/bitcoin.conf`
-Data directory:      `~/Library/Application Support/Bitcoin`
-Lock file:           `~/Library/Application Support/Bitcoin/.lock`
+    Binary:              /usr/local/bin/bitcoind
+    Configuration file:  ~/Library/Application Support/Bitcoin/bitcoin.conf
+    Data directory:      ~/Library/Application Support/Bitcoin
+    Lock file:           ~/Library/Application Support/Bitcoin/.lock
 
 Installing Service Configuration
 -----------------------------------
diff --git a/doc/tor.md b/doc/tor.md
index 8a2aef2d07..e38ada5bd6 100644
--- a/doc/tor.md
+++ b/doc/tor.md
@@ -21,39 +21,39 @@ information in the debug log about your Tor configuration.
 The first step is running Bitcoin Core behind a Tor proxy. This will already anonymize all
 outgoing connections, but more is possible.
 
-	-proxy=ip:port  Set the proxy server. If SOCKS5 is selected (default), this proxy
-	                server will be used to try to reach .onion addresses as well.
-	                You need to use -noonion or -onion=0 to explicitly disable
-	                outbound access to onion services.
-
-	-onion=ip:port  Set the proxy server to use for Tor onion services. You do not
-	                need to set this if it's the same as -proxy. You can use -onion=0
-	                to explicitly disable access to onion services.
-	                Note: Only the -proxy option sets the proxy for DNS requests;
-	                with -onion they will not route over Tor, so use -proxy if you
-	                have privacy concerns.
-
-	-listen         When using -proxy, listening is disabled by default. If you want
-	                to manually configure an onion service (see section 3), you'll
-	                need to enable it explicitly.
-
-	-connect=X      When behind a Tor proxy, you can specify .onion addresses instead
-	-addnode=X      of IP addresses or hostnames in these parameters. It requires
-	-seednode=X     SOCKS5. In Tor mode, such addresses can also be exchanged with
-	                other P2P nodes.
-
-	-onlynet=onion  Make outgoing connections only to .onion addresses. Incoming
-	                connections are not affected by this option. This option can be
-	                specified multiple times to allow multiple network types, e.g.
-	                ipv4, ipv6 or onion. If you use this option with values other
-	                than onion you *cannot* disable onion connections; outgoing onion
-	                connections will be enabled when you use -proxy or -onion. Use
-	                -noonion or -onion=0 if you want to be sure there are no outbound
-	                onion connections over the default proxy or your defined -proxy.
+    -proxy=ip:port  Set the proxy server. If SOCKS5 is selected (default), this proxy
+                    server will be used to try to reach .onion addresses as well.
+                    You need to use -noonion or -onion=0 to explicitly disable
+                    outbound access to onion services.
+
+    -onion=ip:port  Set the proxy server to use for Tor onion services. You do not
+                    need to set this if it's the same as -proxy. You can use -onion=0
+                    to explicitly disable access to onion services.
+                    Note: Only the -proxy option sets the proxy for DNS requests;
+                    with -onion they will not route over Tor, so use -proxy if you
+                    have privacy concerns.
+
+    -listen         When using -proxy, listening is disabled by default. If you want
+                    to manually configure an onion service (see section 3), you'll
+                    need to enable it explicitly.
+
+    -connect=X      When behind a Tor proxy, you can specify .onion addresses instead
+    -addnode=X      of IP addresses or hostnames in these parameters. It requires
+    -seednode=X     SOCKS5. In Tor mode, such addresses can also be exchanged with
+                    other P2P nodes.
+
+    -onlynet=onion  Make outgoing connections only to .onion addresses. Incoming
+                    connections are not affected by this option. This option can be
+                    specified multiple times to allow multiple network types, e.g.
+                    ipv4, ipv6 or onion. If you use this option with values other
+                    than onion you *cannot* disable onion connections; outgoing onion
+                    connections will be enabled when you use -proxy or -onion. Use
+                    -noonion or -onion=0 if you want to be sure there are no outbound
+                    onion connections over the default proxy or your defined -proxy.
 
 In a typical situation, this suffices to run behind a Tor proxy:
 
-	./bitcoind -proxy=127.0.0.1:9050
+    ./bitcoind -proxy=127.0.0.1:9050
 
 ## 2. Automatically create a Bitcoin Core onion service
 
@@ -152,57 +152,57 @@ details).
 You can also manually configure your node to be reachable from the Tor network.
 Add these lines to your `/etc/tor/torrc` (or equivalent config file):
 
-	HiddenServiceDir /var/lib/tor/bitcoin-service/
-	HiddenServicePort 8333 127.0.0.1:8334
+    HiddenServiceDir /var/lib/tor/bitcoin-service/
+    HiddenServicePort 8333 127.0.0.1:8334
 
 The directory can be different of course, but virtual port numbers should be equal to
 your bitcoind's P2P listen port (8333 by default), and target addresses and ports
 should be equal to binding address and port for inbound Tor connections (127.0.0.1:8334 by default).
 
-	-externalip=X   You can tell bitcoin about its publicly reachable addresses using
-	                this option, and this can be an onion address. Given the above
-	                configuration, you can find your onion address in
-	                /var/lib/tor/bitcoin-service/hostname. For connections
-	                coming from unroutable addresses (such as 127.0.0.1, where the
-	                Tor proxy typically runs), onion addresses are given
-	                preference for your node to advertise itself with.
-
-	                You can set multiple local addresses with -externalip. The
-	                one that will be rumoured to a particular peer is the most
-	                compatible one and also using heuristics, e.g. the address
-	                with the most incoming connections, etc.
-
-	-listen         You'll need to enable listening for incoming connections, as this
-	                is off by default behind a proxy.
-
-	-discover       When -externalip is specified, no attempt is made to discover local
-	                IPv4 or IPv6 addresses. If you want to run a dual stack, reachable
-	                from both Tor and IPv4 (or IPv6), you'll need to either pass your
-	                other addresses using -externalip, or explicitly enable -discover.
-	                Note that both addresses of a dual-stack system may be easily
-	                linkable using traffic analysis.
+    -externalip=X   You can tell bitcoin about its publicly reachable addresses using
+                    this option, and this can be an onion address. Given the above
+                    configuration, you can find your onion address in
+                    /var/lib/tor/bitcoin-service/hostname. For connections
+                    coming from unroutable addresses (such as 127.0.0.1, where the
+                    Tor proxy typically runs), onion addresses are given
+                    preference for your node to advertise itself with.
+
+                    You can set multiple local addresses with -externalip. The
+                    one that will be rumoured to a particular peer is the most
+                    compatible one and also using heuristics, e.g. the address
+                    with the most incoming connections, etc.
+
+    -listen         You'll need to enable listening for incoming connections, as this
+                    is off by default behind a proxy.
+
+    -discover       When -externalip is specified, no attempt is made to discover local
+                    IPv4 or IPv6 addresses. If you want to run a dual stack, reachable
+                    from both Tor and IPv4 (or IPv6), you'll need to either pass your
+                    other addresses using -externalip, or explicitly enable -discover.
+                    Note that both addresses of a dual-stack system may be easily
+                    linkable using traffic analysis.
 
 In a typical situation, where you're only reachable via Tor, this should suffice:
 
-	./bitcoind -proxy=127.0.0.1:9050 -externalip=7zvj7a2imdgkdbg4f2dryd5rgtrn7upivr5eeij4cicjh65pooxeshid.onion -listen
+    ./bitcoind -proxy=127.0.0.1:9050 -externalip=7zvj7a2imdgkdbg4f2dryd5rgtrn7upivr5eeij4cicjh65pooxeshid.onion -listen
 
 (obviously, replace the .onion address with your own). It should be noted that you still
 listen on all devices and another node could establish a clearnet connection, when knowing
 your address. To mitigate this, additionally bind the address of your Tor proxy:
 
-	./bitcoind ... -bind=127.0.0.1
+    ./bitcoind ... -bind=127.0.0.1
 
 If you don't care too much about hiding your node, and want to be reachable on IPv4
 as well, use `discover` instead:
 
-	./bitcoind ... -discover
+    ./bitcoind ... -discover
 
 and open port 8333 on your firewall (or use port mapping, i.e., `-upnp` or `-natpmp`).
 
 If you only want to use Tor to reach .onion addresses, but not use it as a proxy
 for normal IPv4/IPv6 communication, use:
 
-	./bitcoind -onion=127.0.0.1:9050 -externalip=7zvj7a2imdgkdbg4f2dryd5rgtrn7upivr5eeij4cicjh65pooxeshid.onion -discover
+    ./bitcoind -onion=127.0.0.1:9050 -externalip=7zvj7a2imdgkdbg4f2dryd5rgtrn7upivr5eeij4cicjh65pooxeshid.onion -discover
 
 ## 4. Privacy recommendations