Removing not necessarily indentations in update Ruby code block

doc/update/10.7-to-10.8.md

@@ -38,16 +38,16 @@ You can check which version you are running with `ruby -v`.
 
 Download Ruby and compile it:
 
-  ```bash
-    mkdir /tmp/ruby && cd /tmp/ruby
-    curl --remote-name --progress https://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.7.tar.gz
-    echo '540996fec64984ab6099e34d2f5820b14904f15a  ruby-2.3.7.tar.gz' | shasum -c - && tar xzf ruby-2.3.7.tar.gz
-    cd ruby-2.3.7
-
-    ./configure --disable-install-rdoc
-    make
-    sudo make install
-  ```
+```bash
+mkdir /tmp/ruby && cd /tmp/ruby
+curl --remote-name --progress https://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.7.tar.gz
+echo '540996fec64984ab6099e34d2f5820b14904f15a  ruby-2.3.7.tar.gz' | shasum -c - && tar xzf ruby-2.3.7.tar.gz
+cd ruby-2.3.7
+
+./configure --disable-install-rdoc
+make
+sudo make install
+```
 
 Install Bundler: